... groove ball bearing RLS,long life and low noise 1.High precision & quality 2.ISO 9001 ... groove ball bearing RLS,long life and low noise Material: chrome steel STEEL NO.COMPONENTCSiMnCrMoPS CuNiGCr150.95 ... wider Series, Inch R series,MR Series,RLS series,RMS seriesSpecification:1) Open, Z, ZZ, RZ,2RZ,RS ... P0), ABEC-3 (P6), ABE C-5(P5)4) Noise Level: Z2V1, Z3V2 , Z4V35) Application: Caster bearings, Home ...