... , galvanization, nickelizing, chromeplating6. Model: type A, type B, and type C. Single, Double, Triple35B 10T~80T, 40B 9T~90T, 50B 9T ... . Standard dimensiong for hub, height, diameter8. Processing: forging hobbing, quenching. CNC machine9. Manufacture strictly in according to ISO, DIN,ANSI,JIS ...