● Material : 45# Steel
● Color: Black
● Surface finish: No high frequency treatment, but it has been black oxide coating.
● Model : 0.5 Mod 20T/40T Spur Gear
1. Gear Module: 0.5M
2. Number of teeth: 20 /40Teeth
3. Gear outer diameter: about 11mm
4. Gear Bore Diameter: 5/6/6.35/8/10mm