NTN Bearing 6004 Single Row Deep Groove Radial Ball Bearing, Normal Clearance, Steel Cage, 20 mm Bore ID, 42 mm OD, 12 mm Width, Open: Amazon.com: Industrial & Scientific
KOYO 6004 2RS C3 Deep Groove Ball Bearings 20 x 42 x 12mm Same Day Shipping !!!: Amazon.com: Industrial & Scientific
Amazon.com: MRC (SKF) 5206SBZZ - Double Row Angular Contact Bearing - 30 mm Bore, 62 mm OD, 1.0625 in Width, Double Seal, 30 Contact Angle, C3 : Industrial & Scientific
2PACK TIMKEN 6004-ZZ Double Metal Seal Bearings 20x42x12mm, Pre-Lubricated and Stable Performance and Cost Effective, Deep Groove Ball Bearings.: Amazon.com: Industrial & Scientific