Airsoft Gear Set
1.Drive Ratio: 12:1/ 13:1/ 16:/ 18:1/ SR25/ 9:1(DSG)
2.Color:Black
3.Type: Magnetic Control Gear Set & New Gear Set
4.Material:40Cr Steel(Sector Gear & Spur Gear& Center Shaft Gear of Bevel Gear), MIM(Bevel Gear), 420F Stainless Steel (PIN)
5.Rockwell Hardness:HRC42-47(Gear) / HRC55-60(PIN)
6.Suitable for version 2 or 3 airsoft gearbox