... 3. Quick delivery, good service 4. 20 years supply stainless steel ball bearing1. High precision 2. ISO9000 Quality 3. ... noise3. material: high chrome, carbon steel, stainless steel, etc,4. Retainer: copper cage, nylon retainer, steel retainer5. Sealing form: OPEN, Z,ZZ ... days after orderNo.6: Packaging:1. Inner packing: plastic paper, paper boxes(neutral or color)2. Outer packing: standard export ...