1. High strength, high torque, good comprehensive mechanical properties
2. Low vibration, low noise, easy to clean and maintain, easy to operate
3. Smooth surface can withstand slight wear and tear, hardened to improve work efficiency.
Product Description:Name:Spur Gear 1 Module
Number of teeth: 20 teeth/21 teeth/22 teeth
Outer diameter: 22-31mm
Inner hole::4-15mm.
Total thickness: about 18mm
Top wire: 2 fixing screw holes M4
Surface:Blackening.Package Include:According to your Choose !