Bearing Shop Online - an MBA business

Nuts Lock For Bearings Categories


Nuts - Lock - For Bearings - Right Hand Thread - Standard AN-KM Series
Nuts - Lock - For Bearings - Right Hand Thread - Standard AN-KM Series

Also see combined categories:
All Lock Nuts for Bearings


There is also a good range of Nuts - Lock - For Bearings - Right Hand Thread - Standard AN-KM Series on the Small Parts and Bearings website.


Bearings - One Way - Sprag - Standard
Bearings - One Way - Sprag - Standard

Also see combined categories:
All One Way Clutch Bearings

Sprag clutch bearings allow your application to turn one way whilst locking in the opposite direction.

Designed for press fit installation. Correct interference dimensions must be maintained to obtain maximum bearing and clutch performance. Mount the clutch ensuring that the shaft drive directionis in the direction indicated by the arrow on the inner race. To install, use a press tool / do not hammer or apply other stock to clutch. Make sure housing has enough strength to withstand press required for fitting installation. High carbon hardened steel alloy. Always lock out power switch before installing, removing, lubricating or servicing a system that uses Cam Clutch products. When connecting or disconnecting Cam Clutch products, eye protection is required. Wear safety glasses, protective clothing, gloves and safety shoes.

Related Information:

There is also a good range of Bearings - One Way - Sprag - Standard on the Small Parts and Bearings website.


Bearings - For Cast Iron Housings
Bearings - For Cast Iron Housings


Insert bearings with spherical OD for use with cast iron flanged and pillow block housings.

Grub Screw locking. Preferred misallignment of no more than 2o, but can accommodate up to 6o. Also available with eccentric locking collars on request. Lubrication Hole to match Lubrication groove in housing.

Related Information:

There is also a good range of Bearings - For Cast Iron Housings on the Small Parts and Bearings website.


Bearings - For Pressed Metal Housings
Bearings - For Pressed Metal Housings


Insert bearings with spherical OD for use with pressed metal flanged and pillow block housings.

Grub Screw locking. Preferred misallignment of no more than 2o, but can accommodate up to 6o. Also available with eccentric locking collars on request.

Related Information:

There is also a good range of Bearings - For Pressed Metal Housings on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Cast Iron
Housings - Bearing - Pillow Block - Cast Iron


Lubrication Groove. Bearings sold separately. Larger sizes available on request. Use with steel bearing inserts for cast iron housings.

Related Information:

There is also a good range of Housings - Bearing - Pillow Block - Cast Iron on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Plastic
Housings - Bearing - Pillow Block - Plastic


Use with steel or plastic bearing inserts for plastic housings.

Load and speed capability depend on the bearing used.

Related Information:

There is also a good range of Housings - Bearing - Pillow Block - Plastic on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Pressed Metal
Housings - Bearing - Pillow Block - Pressed Metal


Bearings sold separately. Use with steel bearing inserts for pressed metal housings. Larger sizes available on request.

Related Information:

There is also a good range of Housings - Bearing - Pillow Block - Pressed Metal on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Miniature
Housings - Bearing - Pillow Block - Miniature


Spyraflo aluminium pillow block housings mounted with 440C stainless miniature bearings

No more need for expensive engineering of housings to suit your new applications. Fully greased Japanese 440C Grade corrosion resistant stainless steel ball bearings. Double shielded bearings to minimise contamination.

Related Information:

There is also a good range of Housings - Bearing - Pillow Block - Miniature on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Die Cast
Housings - Bearing - Pillow Block - Die Cast

Also see combined categories:
All Housings with Integral Bearing

Zinc Die Cast Housings with or without Sintered Bronze Bearings.

Lubricable. With or without standard sintered bronze bearings.

There is also a good range of Housings - Bearing - Pillow Block - Die Cast on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Nylon with Ertalyte Bearing
Housings - Bearing - Pillow Block - Nylon with Ertalyte Bearing

Also see combined categories:
All Housings with Integral Bearing

Flanged Ertalyte Bearing in Moulded Nylon 101 Housing.

Self-Lubricating. High Performance. Electrically Insulating.

There is also a good range of Housings - Bearing - Pillow Block - Nylon with Ertalyte Bearing on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Thermoplastic - W300
Housings - Bearing - Pillow Block - Thermoplastic - W300

Also see combined categories:
All Housings with Integral Bearing

Iglide L280 / Igus W300 Ball with Thermoplatic Body.

Maintenance Free, Lightweight, Self-Lubricating. Compensates for alignment errors. Temperature Range -40 oC to +130 oC. Max. Static Tensile Strength is Long Term. Info for Short Term also available.

There is also a good range of Housings - Bearing - Pillow Block - Thermoplastic - W300 on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Frelon - Precision - Closed
Housings - Bearing - Pillow Block - Frelon - Precision - Closed


Single and double length

Bearing is Frelon Gold -tm- encased in a flanged housing made from 6061-T6 aluminium. Double length has two bearings mounted internally. For rotating and linear motion.

There is also a good range of Housings - Bearing - Pillow Block - Frelon - Precision - Closed on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Frelon - Precision - Open
Housings - Bearing - Pillow Block - Frelon - Precision - Open


Single and double length

Bearing is Frelon Gold -tm- encased in a flanged housing made from 6061-T6 aluminium. Double length has two bearings mounted internally. For rotating and linear motion.

There is also a good range of Housings - Bearing - Pillow Block - Frelon - Precision - Open on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Frelon - Standard - Closed
Housings - Bearing - Pillow Block - Frelon - Standard - Closed


Bearing is Frelon Gold -tm- encased in a flanged housing made from 6061-T6 aluminium. For rotating and linear motion.

There is also a good range of Housings - Bearing - Pillow Block - Frelon - Standard - Closed on the Small Parts and Bearings website.


Housings - Bearing - Pillow Block - Frelon - Standard - Open
Housings - Bearing - Pillow Block - Frelon - Standard - Open


Bearing is Frelon Gold -tm- encased in a flanged housing made from 6061-T6 aluminium. For rotating and linear motion.

There is also a good range of Housings - Bearing - Pillow Block - Frelon - Standard - Open on the Small Parts and Bearings website.


Housings - Pillow Block - Washdown
Housings - Pillow Block - Washdown

Also see combined categories:
All Spyraflo Pillow Block Mounted Bearings
All Spyraflo Mounted Bearings

Spyraflo electroless nickel plated aluminium housing with stainless steel coated self aligning acetal bearings.

See links at bottom of web page for more information. +/- 5% Static Alignment. Electroless nickel plated aluminium housing. Corrosion Resistant. Light weight.

Related Information:

There is also a good range of Housings - Pillow Block - Washdown on the Small Parts and Bearings website.


Housings - Pillow Block - Self Aligning - Needle Roller
Housings - Pillow Block - Self Aligning - Needle Roller

Also see combined categories:
All Spyraflo Pillow Block Mounted Bearings
All Spyraflo Mounted Bearings

Spyraflo robust light weight aluminium housing with self aligning needle roller bearings.

See links at bottom of web page for more information. +/- 5% Static Alignment. Sintered aluminium housing. Corrosion Resistant. Light weight.

Related Information:

There is also a good range of Housings - Pillow Block - Self Aligning - Needle Roller on the Small Parts and Bearings website.


Housings - Pillow Block - Self Aligning - Sintered Bronze
Housings - Pillow Block - Self Aligning - Sintered Bronze

Also see combined categories:
All Spyraflo Pillow Block Mounted Bearings
All Spyraflo Mounted Bearings

Spyraflo robust light weight aluminium housing with porous sintered bronze

See links at bottom of web page for more information. +/- 5% Static Alignment. Sintered aluminium housing. Corrosion Resistant. Light weight.

Related Information:

There is also a good range of Housings - Pillow Block - Self Aligning - Sintered Bronze on the Small Parts and Bearings website.


Housings - Pillow Block - Self Aligning - Low Temp - PTFE Bronze
Housings - Pillow Block - Self Aligning - Low Temp - PTFE Bronze

Also see combined categories:
All Spyraflo Pillow Block Mounted Bearings
All Spyraflo Mounted Bearings

Spyraflo robust light weight aluminium housing with low temperature PTFE bronze

See links at bottom of web page for more information. +/- 5% Static Alignment. Sintered aluminium housing. Corrosion Resistant. Light weight.

Related Information:

There is also a good range of Housings - Pillow Block - Self Aligning - Low Temp - PTFE Bronze on the Small Parts and Bearings website.


Housings - Linear - Pillow Block - Closed - Ceramic Coated
Housings - Linear - Pillow Block - Closed - Ceramic Coated

Also see combined categories:
All Linear Bearing Housings
All Linear Bearing Housings With Bearing

Approved for direct food contact in applications where animal fat or food approved lubricants are present.

Able to withstand rapid oscillation, contamination, shock/vibration, wash downs, submersion and shaft brinelling. DO NOT USE WD-40 or Silcone based spray lubricants.

There is also a good range of Housings - Linear - Pillow Block - Closed - Ceramic Coated on the Small Parts and Bearings website.


Housings - Linear - Thomson Super Smart Pillow Block - Closed
Housings - Linear - Thomson Super Smart Pillow Block - Closed

Also see combined categories:
All Linear Bearing Housings
All Linear Bearing Housings With Bearing

Includes Bearings.


Related Information:

There is also a good range of Housings - Linear - Thomson Super Smart Pillow Block - Closed on the Small Parts and Bearings website.






Bearings - Acetal - Disk Cleaning Applications
Bearings - Acetal - Disk Cleaning Applications


Special acetal bearings for disk cleaning


There is also a good range of Bearings - Acetal - Disk Cleaning Applications on the Small Parts and Bearings website.


Bearings - Acetal - Double Row - with 316 Stainless Steel Balls
Bearings - Acetal - Double Row - with 316 Stainless Steel Balls

Also see combined categories:
All Plastic Ball Bearings
All Plastic Double Row Bearings

Bearings for Extreme Corrosion Resistance - Low Speed - Low Load.

Races made from Acetal - Balls made from 316 Stainless Steel - Cages from Acetal or Nylon. Lubrication - Water Lubrication or can be run dry - Must lubricate over 2500 RPM. Temperature Range - Minus 30 oC to 100 oC Continuous.

Related Information:

There is also a good range of Bearings - Acetal - Double Row - with 316 Stainless Steel Balls on the Small Parts and Bearings website.


Bearings - Acetal - Double Row - with Glass Balls
Bearings - Acetal - Double Row - with Glass Balls

Also see combined categories:
All Plastic Ball Bearings
All Plastic Double Row Bearings

Bearings for Extreme Corrosion Resistance - Low Speed - Low Load.

Races made from Acetal - Balls made from Ground Glass - Cages from Acetal or Nylon. Lubrication - Water Lubrication or can be run dry - Must lubricate over 2500 RPM. Temperature Range - Minus 30 oC to 100 oC Continuous.

Related Information:

There is also a good range of Bearings - Acetal - Double Row - with Glass Balls on the Small Parts and Bearings website.


Bearings - Acetal - MRI Table
Bearings - Acetal - MRI Table


Special acetal bearings for MRI table wheels


There is also a good range of Bearings - Acetal - MRI Table on the Small Parts and Bearings website.


Bearings - Acetal - Single Row - with 302 Stainless Steel Balls
Bearings - Acetal - Single Row - with 302 Stainless Steel Balls

Also see combined categories:
All Plastic Ball Bearings
All Plastic Single Row Bearings

Bearings for Extreme Corrosion Resistance - Low Speed - Low Load.

Races made from Acetal - Balls made from 302 Stainless Steel - Cages from Acetal or Nylon. Lubrication - Water Lubrication or can be run dry - Must lubricate over 2500 RPM. Temperature Range - Minus 30 oC to 100 oC Continuous.

Related Information:

There is also a good range of Bearings - Acetal - Single Row - with 302 Stainless Steel Balls on the Small Parts and Bearings website.


Bearings - Acetal - Single Row - with 316 Stainless Steel Balls
Bearings - Acetal - Single Row - with 316 Stainless Steel Balls

Also see combined categories:
All Plastic Ball Bearings
All Plastic Single Row Bearings

Bearings for Extreme Corrosion Resistance - Low Speed - Low Load.

Races made from Acetal - Balls made from 316 Stainless Steel - Cages from Acetal or Nylon. Lubrication - Water Lubrication or can be run dry - Must lubricate over 2500 RPM. Temperature Range - Minus 30 oC to 100 oC Continuous.

Related Information:

There is also a good range of Bearings - Acetal - Single Row - with 316 Stainless Steel Balls on the Small Parts and Bearings website.


Bearings - Acetal - Single Row - with Glass Balls
Bearings - Acetal - Single Row - with Glass Balls

Also see combined categories:
All Plastic Ball Bearings
All Plastic Single Row Bearings

Bearings for Extreme Corrosion Resistance - Low Speed - Low Load.

Races made from Acetal - Balls made from Ground Glass - Cages from Acetal or Nylon. Lubrication - Water Lubrication or can be run dry - Must lubricate over 2500 RPM. Temperature Range - Minus 30 oC to 100 oC Continuous.

Related Information:

There is also a good range of Bearings - Acetal - Single Row - with Glass Balls on the Small Parts and Bearings website.


Bearings - Acetal - Special Purpose
Bearings - Acetal - Special Purpose


Special acetal bearings for Bicycle Chain Derailer and special effects lighting systems


There is also a good range of Bearings - Acetal - Special Purpose on the Small Parts and Bearings website.


Bearings - Acetal - Special Types
Bearings - Acetal - Special Types


Light duty acetal bearings used for drawer runners, light duty tracks, garage doors and more.

See descriptions for special features. Not all items are listed in this category. Please contact us if you have a similar type bearing with different dimensions.

There is also a good range of Bearings - Acetal - Special Types on the Small Parts and Bearings website.


Bearings for Pool Equipment
Bearings for Pool Equipment


Acetal bearings for spa jets and pool vacuum wheels

No lubrication required other than the water they are running in.

Related Information:

There is also a good range of Bearings for Pool Equipment on the Small Parts and Bearings website.


Bearings - Polypropylene - Special Types
Bearings - Polypropylene - Special Types


Polypropylene is for special chemical compatibility usages. Please refer to a compatibility chart.

See descriptions for special features. Not all items are listed in this category. Please contact us if you have a similar type bearing with different dimensions.

There is also a good range of Bearings - Polypropylene - Special Types on the Small Parts and Bearings website.


Bearings - Ball - Angular Contact - 440C Stainless
Bearings - Ball - Angular Contact - 440C Stainless

Also see combined categories:
All Angular Contact Bearings

Including miniature sizes down to 8mm from stock and even smaller available.

Single row angular contact ball bearings.

Related Information:

There is also a good range of Bearings - Ball - Angular Contact - 440C Stainless on the Small Parts and Bearings website.


Bearings - Ball - Angular Contact - Chrome Steel
Bearings - Ball - Angular Contact - Chrome Steel

Also see combined categories:
All Angular Contact Bearings

Including miniature sizes down to 8mm from stock and even smaller available.

Single row angular contact ball bearings.

Related Information:

There is also a good range of Bearings - Ball - Angular Contact - Chrome Steel on the Small Parts and Bearings website.


Bearings - Ball - Angular Contact - Flanged - 440C Stainless
Bearings - Ball - Angular Contact - Flanged - 440C Stainless

Also see combined categories:
All Angular Contact Bearings

Single row angular contact ball bearings with flanges.

Related Information:

There is also a good range of Bearings - Ball - Angular Contact - Flanged - 440C Stainless on the Small Parts and Bearings website.


Bearings - Tapered Roller - Single Row - Inch Sets
Bearings - Tapered Roller - Single Row - Inch Sets


Common automotive sets include cup and cone



Bearings - Ball - Ceramic Hybrid
Bearings - Ball - Ceramic Hybrid

Also see combined categories:
All Radial Ball Bearings

Steel Races with Si3N4 Ceramic Balls

Bearings with steel races and ceramic balls. For standard bearings, the balls are usually one of the first components to show wear. Ceramic balls are harder than steel and do not wear as easily. Items with high speed cages have the suffixes T9H, TNH, TW or KC.

Related Information:

There is also a good range of Bearings - Ball - Ceramic Hybrid on the Small Parts and Bearings website.


Bearings - Ceramic Si3N4 - Angular Contact
Bearings - Ceramic Si3N4 - Angular Contact

Also see combined categories:
All Angular Contact Bearings
All Full Ceramic Bearings

Excellent performance in electrical and magnetism sensitive applications. Higher speed than Zr02. Full ceramic silicon nitride.

Applications include cryopumps, medical applications, semiconductors, turbine flow meters, food processing, robotics and optics. Wear and corrosion resistance. Lubrication and maintenance free. 3.2g/cubic cm density. Cages of PTFE or Glass Fibre Reinforced Nylon. Can be made from special aviation aluminum on request. Si3N4 (GSN-201) standard material for balls, cage and rings. HRC80 Hardness. High and low- temperature application. Up to 250 oC with PTFE Cage and 130 Deg C with Nylon Cage.

Related Information:

There is also a good range of Bearings - Ceramic Si3N4 - Angular Contact on the Small Parts and Bearings website.


Bearings - Ceramic Si3N4 - Radial
Bearings - Ceramic Si3N4 - Radial

Also see combined categories:
All Radial Ball Bearings
All Full Ceramic Bearings

Excellent performance in electrical and magnetism sensitive applications. Higher speed than Zr02. Full ceramic silicon nitride.

Applications include cryopumps, medical applications, semiconductors, turbine flow meters, food processing, robotics and optics. Wear and corrosion resistance. Lubrication and maintenance free. 3.2g/cubic cm density. Cages of PTFE or Glass Fibre Reinforced Nylon. Can be made from special aviation aluminum on request. Si3N4 (GSN-201) standard material for balls, cage and rings. HRC80 Hardness. High and low- temperature application. Up to 250 oC with PTFE Cage and 130 Deg C with Nylon Cage.

Related Information:

There is also a good range of Bearings - Ceramic Si3N4 - Radial on the Small Parts and Bearings website.


Bearings - Ceramic ZrO2 - Radial
Bearings - Ceramic ZrO2 - Radial

Also see combined categories:
All Radial Ball Bearings
All Full Ceramic Bearings

Excellent performance in electrical and magnetism sensitive applications. Not for High Speed. Full ceramic zirconia.

Applications include cryopumps, medical applications, semiconductors, turbine flow meters, food processing, robotics and optics. Wear and corrosion resistance. Lubrication and maintenance free. Cages of PTFE or Glass Fibre Reinforced Nylon. Can be made from special aviation aluminum on request. ZrO2 standard material for balls, cage and rings. Si3N4 available to special order. High and low- temperature application. Up to 250 oC with PTFE Cage and 130 Deg C with Nylon Cage.

Related Information:

There is also a good range of Bearings - Ceramic ZrO2 - Radial on the Small Parts and Bearings website.


Bearings - Ceramic ZrO2 - Self Aligning - Double Row
Bearings - Ceramic ZrO2 - Self Aligning - Double Row

Also see combined categories:
All Radial Ball Bearings
All Full Ceramic Bearings

Excellent performance in electrical and magnetism sensitive applications. Not for High Speed. Full ceramic zirconia.

Applications include cryopumps, medical applications, semiconductors, turbine flow meters, food processing, robotics and optics. Wear and corrosion resistance. Lubrication and maintenance free. Cages of PTFE or Glass Fibre Reinforced Nylon. Can be made from special aviation aluminum on request. ZrO2 standard material for balls, cage and rings. Si3N4 available to special order. High and low- temperature application. Up to 250 oC with PTFE Cage and 130 Deg C with Nylon Cage.

Related Information:

There is also a good range of Bearings - Ceramic ZrO2 - Self Aligning - Double Row on the Small Parts and Bearings website.


Bearings - Clutch Release - TNK Type
Bearings - Clutch Release - TNK Type

Also see combined categories:
All Clutch Release Bearings



Bearings - Conveyor - Hex Bore - Plastic - Double Row
Bearings - Conveyor - Hex Bore - Plastic - Double Row

Also see combined categories:
All Conveyor Bearings

Plastic hex bore conveyor bearings with 316 stainless balls

Loads and Speeds are for reference only. Testing recommended.

There is also a good range of Bearings - Conveyor - Hex Bore - Plastic - Double Row on the Small Parts and Bearings website.


Bearings - Conveyor - Hex Bore - Plastic - Single Row
Bearings - Conveyor - Hex Bore - Plastic - Single Row

Also see combined categories:
All Conveyor Bearings

Plastic hex bore conveyor bearings with 316 stainless balls

Loads and Speeds are for reference only. Testing recommended.

There is also a good range of Bearings - Conveyor - Hex Bore - Plastic - Single Row on the Small Parts and Bearings website.


Bearings - Conveyor - Hex Bore - Stainless Steel - Double Row
Bearings - Conveyor - Hex Bore - Stainless Steel - Double Row

Also see combined categories:
All Conveyor Bearings

316 stainless conveyor bearings with plastic cage and plastic hex insert

Loads and Speeds are for reference only. Testing recommended.

There is also a good range of Bearings - Conveyor - Hex Bore - Stainless Steel - Double Row on the Small Parts and Bearings website.


Bearings - Conveyor - Hex Bore - Stainless Steel - Single Row
Bearings - Conveyor - Hex Bore - Stainless Steel - Single Row

Also see combined categories:
All Conveyor Bearings

316 stainless conveyor bearings with plastic cage and plastic hex insert

Loads and Speeds are for reference only. Testing recommended.

There is also a good range of Bearings - Conveyor - Hex Bore - Stainless Steel - Single Row on the Small Parts and Bearings website.


Bearings - Roller - Cylindrical - Double Row NN Series
Bearings - Roller - Cylindrical - Double Row NN Series

Also see combined categories:
All Cylindrical Roller Bearings

Outer Ring Removable



Bearings - Roller - Cylindrical - Double Row - Tapered Bore NN-K Series
Bearings - Roller - Cylindrical - Double Row - Tapered Bore NN-K Series

Also see combined categories:
All Cylindrical Roller Bearings

Outer Ring Removable



Main Pages



Freight Rates
Terms and Conditions
Privacy Policy

Registered Australian Company: Small Parts & Bearings Pty Ltd (ABN 79 121 865 414) - Trading as Bearing Shop Online

Bearing Shop Online offers 25626 products in 541 categories including ball bearings, roller bearings, thrust bearings, ceramic and ceramic hybrid bearings, stainless steel bearings, miniature bearings, linear bearings, shafting, oil seals and adhesives - see the full listing in the Online Catalogue. We have excellent Freight Rates within Australia and worldwide. We offer a choice of delivery with a signature required, or cheaper options with no signature required. The no signature required options are at the customer’s risk once the goods leave our store.

Using the links throughout this site you will find extensive information including catalogues, technical data, and other product specific information. We sell our products worldwide through our online store and our overseas freight rates are competitive for fully traceable courier delivery.

Bearing Shop Online is part of MBA Group offering a select range from the MBA Group catalogue.

Bearing Shop Online products are not authorised for sale into the USA or Canada due to the reluctance of Australian insurers to provide product liability insurance into those two countries.

Information on this website is Copyright Bearing Shop Online 1997. All rights reserved.

Freight Rates
Terms and Conditions
Privacy Policy

Registered Australian Company: Small Parts & Bearings Pty Ltd (ABN 79 121 865 414) - Trading as Bearing Shop Online

Bearing Shop Online offers 25626 products in 541 categories including ball bearings, roller bearings, thrust bearings, ceramic and ceramic hybrid bearings, stainless steel bearings, miniature bearings, linear bearings, shafting, oil seals and adhesives - see the full listing in the Online Catalogue. We have excellent Freight Rates within Australia and worldwide. We offer a choice of delivery with a signature required, or cheaper options with no signature required. The no signature required options are at the customer’s risk once the goods leave our store.

Using the links throughout this site you will find extensive information including catalogues, technical data, and other product specific information. We sell our products worldwide through our online store and our overseas freight rates are competitive for fully traceable courier delivery.

Bearing Shop Online is part of MBA Group offering a select range from the MBA Group catalogue.

Bearing Shop Online products are not authorised for sale into the USA or Canada due to the reluctance of Australian insurers to provide product liability insurance into those two countries.

Information on this website is Copyright Bearing Shop Online 1997. All rights reserved.