... .Material pure 3.Competitive price 4.Low noise,OEMservice Thrust ball bearing, bearing manufactureHigh quality,Short delivery date 511,512,513 ... ,532,533,533,523,542,543 type 1.Thrust ball bearing : inch series and metric series .2.Structures: 511,512 ... have machined brass cages(suffix MB),or pressed steel (suffix E)5.Ring Material: GCr15, GCr15SiMn6.Cage : pressed steel 51118~51152 ...