... 62011. Product range of use: 1) These bearing are widely used in automobile, electrical. (Home appliances, electric tools, fitness equipment, motors, ... / Closure: Plain (Open), Z, ZZ, RS, 2RS, 2ZR, 2Z. 5) Vibration and Noisy level: Z1, Z2, Z3, ZV1, ZV2.ZV3.Z1V1 ... our product specification iswell-founded. We have a good reputation in the international market by our perfect service and sufficient supply ...