【Feature】64T main gear and 17T 21T 26T 29T motor gears combo. 64T steel gears general for 1/10 trams, 17T, 21T for HSP 94111PRO 94111, 26T for HSP 94107 94170, 94123, 941031,29T for HSP 94123
【Spec】17T 21T 26T 29T Pinion gear aperture is 3.175mm, perfectly compatible with your motor, 64T Main gear aperture is 5mm, perfectly compatible with your Gearbox Transmission Box
【Material】Steel Metal material, anti-wear, strong and durable, Rust-proof treatment on the surface of gears,more powerful and more stable.