Radial Ball Bearing, Sealed, Bore Dia. 30mm, Outside Dia. 72mm, +0/-11 micron, Width 19mm, ABEC Tolerance 1, Dynamic Load Capacity 6,700 lb., Static Load Capacity 3,600 lb., Max. RPM 13000, Temp. Range -40 Degrees to 212 Degrees F, Steel Bearing Material, Pressed Steel Cage Material, Synthetic Rubber Seal Material, MT47 Grease, Industry Number 6306 2RS.