... 13 year experience, 2.Certificate ISO9001.2008, 3.Material: Bearing steel, 4.Various size and type, 5.15-30days delive ... bearings, We can supply all kinds of water pump bearing ball-ball and ball-roller. With high-quality material ... balls, one row of rollers; WIR, WN, WKH, 665000 series, etc. 2 Material: Mainly the chrome Steel (GCr15) High ... : Widely used in auto, machine,etc Water pump bearing W series