NTN Bearing 6001 Single Row Deep Groove Radial Ball Bearing, Normal Clearance, Steel Cage, 12 mm Bore ID, 28 mm OD, 8 mm Width, Open: Amazon.com: Industrial & Scientific
PGN (4 Pack) 6001-ZZ Bearing - Lubricated Chrome Steel Sealed Ball Bearing - 12x28x8mm Bearings with Metal Shield & High RPM Support: Amazon.com: Industrial & Scientific