... 3. Quick delivery, good service 4. 20 years supply stainless steel ball bearing1. High precision 2. ISO9000 Quality 3. Quick ... low noise3. material: high chrome, carbon steel, stainless steel, etc,4. Retainer: copper cage, nylon retainer, steel retainer5. Sealing form: OPEN, Z,ZZ, ... . We have ten years experience in bearings.2. We provide you best quality, excellent service, on time delivery and ...