Features:
Suitable shaft diameter: 3.175mm (motor gear); 5mm (main gear).
Made of high quality material.
Durable metal construction for long-lasting performance.
Rust-proof treatment on the surface of gears.
Suitable for Redcat Lightning EPX Drift, Lightning EPX PRO, Sandstorm, Sandstorm TK, Tsunami EPX, Volcano Epx/epx PRO, Vortex ,Trx HSP 1/10 Monster Truck

Descriptions:
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

Specifications:
Material: Metal
Teeth: 64T and 17T 21T 26T 29T
Height: 11mm (motor gear); 9mm (main gear)
Tip diameter
17T: 11.5mm
21T: 14mm
26T: 16.5mm
29T: 18.5mm
64T: 40mm
Suitable Model:
64T main gear and 17T 21T 26T 29T motor gears combo. 64T steel gears general for 1/10 RC Car, 17T, 21T for HSP 94111PRO 94111, 26T for HSP 94107 94170, 94123, 941031,29T for HSP 94123

Package included:
1 * 64T Main Gear
1 * 17T Gear
1 * 21T Gear
1 * 26T Gear
1 * 29T Gear

Note:
Due to the different monitor and light effect, the actual color maybe a slight different from the picture color.
Please allow 1-3mm differs due to manual measurement.