Radial Ball Bearing, Bearing Industry Number 6011, Bore Diameter 55 mm, Closure Open, For Environment Oily/Greasy, Outer Ring Width 18 mm, Outside Diameter 90 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/- 0.015 mm, Dynamic Radial Load Capacity 6, 350 lbf, Includes Retaining Ring No