Automotive water pump bearing W series, W-S series, WS series, WK series 1.Standard:ISO9001:2000 2.Clearance:C2 C3 C4 C5 3.Cage Material:Brass, Steel 4.Ring Material:GCr15 GCr15Si 5.precision Specifications 1) Used in automotive water pumps, and basically consists of standard double-row bearings. 2) Models available: WIB, BWF, WS, WK water pump bearing Features : 1) Used in automotive water pumps, and basically consists of standard double-row bearings