Our shop is based on the principle of "service and quality first" and we look forward to welcoming every customer.0.5M 10TNumber of teeth: 10 teethModulus: 0.5Inner hole: 2.3mmThickness: 5/6mm Outer diameter: 6mm / 6.4mmPractical use in remote control aircraft, various modelsThank you for your visit, any problems can be contacted and resolved in person with the shop!