Instructions:

*This new main gear is great for the balance. New super strength plastic-steel material, multinational patent design, light weight, and special cooling blade design is good for lowering the temperature of electronic equipment and motors. It can efficiently increase the wind flow.
*Used for the T-REX450 XL/CF/SE/S/Pro/Sport

Included in box:
*New main drive gear (150T) x 3
*Weight:12g/pcs