... Low price and good quality 4,The materials are bearing steel Our bearing have high quality low noise & competitive price! ... used: GCr15,Carbon Steel, Stainless Steel, Chrome Steel,Bearing Steel3) Shield/closure: open bearing, Z, ZZ, RS, 2RS,RZ, OPEN4) ... to the customer’s requirements8) Certificates: ISO 9001:20089) Application; Motorcycle, Motor, Pump, Fan, Are conditioner, Microwave Oven, Rangehood, ...