1)Materials: Stainless steel, carbon steel, spring steel, aluminum and brass , Alloy Steel, Alloy-Carburized Steel. 2)Different models are available, Different size are offered. 3) Gear Grade: DIN: 2~4 grade; AGMA: 10~12 grade. 4) Used on motorcycle engines. Suitable for 100cc, 110cc, 125cc and 150cc motorcycles etc. . 5) Main processing: Precision hot and cold forging, precision machining and extrusion pressing. 6) Teeth profile processes: Grinding, Shaving, Hobbing, Shaping(Gear shaper). 7) Good wear resistance and high strength; High precision and low noise.