'Cartridge Ball Bearing, Double Contact Sealed, Bore Dia. 17.00mm, Outside Dia. 40.00mm, +0/-0.011mm, Width 17.50mm, ABEC Tolerance 1, Dynamic Load Capacity 2, 160 lb., Static Load Capacity 1, 030 lb., Max. RPM 12, 000, Temp. Range -13 Degrees to 250 Degrees F, Steel Bearing Material, Pressed Steel Cage Material, NBR Seal Material, Polyrex EM Grease'