ASK US ABOUT MULTIPLE COMPONENT STORE-WIDE DISCOUNTS!In-Stock and Ready to ShipWheels Mfg. Replacement Retianer Bearings  10 x 5/16" 10 bearings 5/16" size in retainer. (1 retainer per listing) Fits typical Standard USA BB. Note: Picture does not necessarily show what exact bearing is included in this listing but is used for depiction of general type of product being listed.