Manufacturer Description

This is an Align M0.8, 34 Tooth Torque Tube Front Drive Gear Set, and is intended for use with the Align T-Rex 550 V2 and 600 Pro helicopters.
Includes:
(1) Modulus: 0.8 Front drive gear assembly (4x4.5x51mm)
(1) Front umbrella gear (20T) (21.2x33.6mm)
(1) Tail umbrella gear (20T) (21.2x12.5mm)

Note: In order to use this torque tube drive gear set on a T-REX 550, the helicopter must be equipped with the slanted gear setup. To determine if your helicopter uses slanted gears or straight-cut gears, observe the main drive gear which will either have slanted or straight-cut teeth.