Radial Ball Bearing, Bearing Industry Number 6004, Bore Diameter 20 mm, Closure Open, For Environment Oily/Greasy, Outer Ring Width 12 mm, Outside Diameter 42 mm, Ring Material Alloy Steel, System of Measurement Metric, Cage Material Steel, ABEC Rating 1, Ball Material Alloy Steel, Ball Material Grade AISI 52100, Bore Diameter Tolerance +0/- 0.1 mm, Dynamic Radial Load Capacity 2, 110 lbf, Includes Retaining Ring No