Our bearing have high quality low noise & conpetitive price! Certificates: ISO 9001:2000 ... bearing, Z, ZZ, RS, 2RS.3) Vibration and Noise level: Z1, Z2, Z3. ZV2, ZV3, Z2V2, ... ABEC3, ABEC5,ABEC7.5) Files usd in; Motocycle, Motor, Pump, Fan, Are conditioner, Microwave Oven, Rangehood, sewing machine, ... we also have ability to produce your own brand or other famous brand which you want.7) Packing ...