1).Quality standard:ISO9001:2000 2).Material:GCr15,GCr15SiMn Gcr15-China, (AISI) 52100- ... cover: Z, ZZ, RS, 2RS, RZ, ZNR, etc.4. Vibration and Noisy level: Z1, Z2, Z3 ZV1.ZV2.ZV3, 5. Precision ... , tools, etc.7. Packing: individual box single plastic bag, cartons and wooden cases8. Production range: standard and non-standad