... , Roller Chains, Belts etc. )Auto Car Parts. (Clutch Release Bearing, Tensioner Bearing, Wheel Bearing etc.)1.ISO9001:2000,EMQ quality, low price.2 ... ,Ball bearings,BearingsA: Inner Ring Bore Diameter from 1mm-200mmB: Bearing range:1)60series: 602-60402)62series: 623-62403)63series: 633 ... .F: Raw Material: Gcr15 Chrome Steel, Stainless Steel AISI440C, Ceramic Si3N4.