Radial Ball Bearing, Bearing Industry Number 6308, Bore Diameter 40 mm, Closure Open, For Environment Oily/Greasy, Outer Ring Width 23 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/-0.012 mm, Dynamic Radial Load Capacity 9,100 lbf, Includes Retaining Ring No