... certified 3.Stable in chemical Deep groove ball bearing RLS,long life and low noise Material: chrome steel STEEL NO.COMPONENTCSiMnCrMoPS ... seriesSpecification:1) Open, Z, ZZ, RZ,2RZ,RS, 2RS 2) Clearance: C0, C2, C3 3) Precision Tolerance: ABEC-1 (P0), ABEC ... Appliance bearings, Electric Motor bearings, 6) Material: Chrome steel 157) Long life and good hand feelingDetailed size: Bearing No Dimensions(mm ...