... Bearings 1.High precision & quality 2.ISO 9001 certified 3.Low noise,Stable in chemical 2013 New Taper Roller Bearings Material: chrome steel ... ), etc Specification:1) Open, Z, ZZ, RZ,2RZ,RS, 2RS 2) Clearance: C0, C2, C3 3) Precision Tolerance: ABEC-1 (P0 ... ), ABEC-3 (P6), ABE C-5(P5)4) Noise Level: Z2V1, Z3V2 , Z4V3Detailed size: Bearing ...