1.Material:GCR15;chrome steel 2.Certificate:ISO9001 3.Good delivery time 4.Small order accept 5.Competitive price Series:· Drawn cup needle roller bearings ( HK, BK, Inch series )· Sealed drawn cup needle roller bearings ( HK…RS, HK…2RS, BK…RS series)· Drawn cup full component needle roller bearings ( F, FH, MF, MFH, FY series)· Drawn cup roller clutches / clutch and bearing assemblies ( HF, HFL ...