Radial Ball Bearing, Bearing Industry Number 6306, Bore Diameter 30 mm, Closure Double Sealed, Outer Ring Width 19 mm, Outside Diameter 72 mm, Ring Material Alloy Steel, Seal Type Contact, System of Measurement Metric, Cage Material Steel, ABEC Rating 1, Ball Material Alloy Steel, Bore Diameter Tolerance +0/-0.007 mm, Dynamic Radial Load Capacity 6,700 lbf, Includes Retaining Ring No, Lubricant Material MT47 Grease