... , Europe, Oceania, Middle East, Africa3. Manufacturing method: forged or welded, lathe, hobbing, high frequency quenching,4. Material: C45, A3, cast iron ... . Standard dimensiong for hub, height, diameter8. Processing: forging hobbing, quenching. CNC machine9. Manufacture strictly in according to ISO, DIN,ANSI,JIS ... -76,32B9-76 PackingPlastic bag+plywood case/Pallet sprocket transmission parts