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Exclusive appearance, stable and durable, which meets your different requirements. High efficiency, reducing unnecessary loss of kinetic energy. Compared to other sprockets, our gears have good mechanical processing that reduces roughness and noise and ensures smooth rolling. Due to the rust protection treatment of the gear surface, it does not corrode so easily and can be used for a long time. Thank you for purchasing this durable equipment that is suitable for many occasions. › See more product details; Product description Specifications: *Material: Nylon *Color: White (as pictures show) *Size: 38 x 38 x 12mm (approx) *Inner diameter of bearing: 8mm (approx) Package contents: 3. *Gearbox with bearing3 *Circlips Note: 1. The real colour of the item may be slightly different from the pictures shown on the website due to various factors such as the brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation.; Product description Specifications: *Material: Nylon *Color: White (as pictures show) *Size: 38 x 38 x 12mm (approx) *Inner diameter of bearing: 8mm (approx) Package contents: 3. *Gearbox with bearing3 *Circlips Note: 1. The real colour of the item may be slightly different from the pictures shown on the website due to various factors such as the brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation.; Specifications: *Material: Nylon *Color: White (as pictures show) *Size: 38 x 38 x 12mm (approx) *Inner diameter of bearing: 8mm (approx) Package contents: 3. *Gearbox with bearing3 *Circlips Note: 1. The real colour of the item may be slightly different from the pictures shown on the website due to various factors such as the brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation.