Instructions:

*This is using the same separate type design of TREX600, easy to replace the gear by removing four screws, no need to remove the one-way bearing.
*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 TREX450 XL/CF/SE/S(tail drive gear 25T)

Included in box:
*New main drive gear (150T) x 1
*New autorotation tail drive gear(106T) x 1
*450 main Gear Case x 1
*Shaft collar x 1
*One-way bearing HF0612 x 1(6x10x12mm)
INA Made in Germany
*Cross screw x 4(M2x4mm)
*Weight:26.5g/set