1. Standard: ISO, GB, JIS, DIN, AGMA 2. FTY with ISO 9001:2008 3. Grade: ISO 5, MAX O.D.0.5M 4. High qaulity with low cost 1. Standard: ISO, GB, JIS, DIN, AGMA and non-standard. 2. Material: stainless steel,cast iron,pig iron,carbon steel,alloy steel,non-ferrous,grey iron,ductile cast iron and so on 3. Surface treatment: Carburizing, hardening and tempering, nitriding, high frequency treatment. 4 ...