... A3 steel(1023), 45#steel(1045), 16Mn Motorcycle Rear Sprocket Motorcycle rear sprocket, motor sprocket, sprocket wheel, motorcycle sprocket ... sprocket, set sprocket,motor gear, motor front gear, motor rear gear, motorcycle sprocket, motorcycle set sprocket, motor complete ... Q345), 16Mn Surface Treatment1. Galvanized(Zinc Plating);2. Chrome Plating;3. Electrophoretic Plating;4. Sanding Blasting;5. Dull ...