Radial/Deep Groove Ball Bearing - Round Bore, 17 mm ID, 40 mm OD, 12 mm Width, Two Seals, C0 Internal ClearanceSuper finished racewaysQuiet operationsISO standard interchangeable dimensionsElectric Motor Quality (EMQ)seal(s) offer superior lubricant retention and bearing protection from contaminantsMost bearings in this series up to 60 mm bore can also be made available in stainless steel (AISI 440C material).