... .ISO 9001 certified 3.Low noise,Stable chemical 2013 High Quality Spherical Roller Bearings Material: chrome steel STEEL NO.COMPONENTCSiMnCrMoPS CuNiGCr150. ... (P0), ABEC-3 (P6), ABE C-5(P5)4) Noise Level: Z2V1, Z3V2 , Z4V35) Application: Caster bearings, Home Appliance bearings, Electric ...