Donepart 6203RS Ball Bearings 17mm ID 40mm OD 12mm Width C3 High Speed 6203-2RS Sealed Bearings for Electric Motor, Pool Pump, Wheels, Bike, Mower (4 Pack): Amazon.com: Industrial & Scientific
6203-2RS C3 High Quality Two Side Rubber Seal Ball Bearing 17x40x12 6203RS | eBay
6203 RS Bearing O.D 40mm x I.D 0.75" x W 12mm - Richmond Wheel & Castor Co