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
SKF 6004-2RZ/LHT23 Deep Groove Ball Bearing, Double Sealed, Standard Cage, Normal Clearance, 20mm Bore , 42mm OD, 12mm Width: Amazon.com: Industrial & Scientific