Radial Ball Bearing, Single Row, Double Sealed, Bore Dia. 20 mm, Outside Dia. 52 mm, Width 15 mm, Synthetic Rubber Seal Material, Metal Shield Material, Snap Ring Retainer Type, ABEC Tolerance 1, Dynamic Load Capacity 3,800 lb, Static Load Capacity 1,800 lb, Max. RPM 19,000 RPM, Temp. Range -40 Degrees to 212 Degrees F, Steel Bearing Material, Pressed Steel Cage Material, MT47 Grease, Industry Number 6304 2RSNR JEM