This is a great replacement for your 500 class Helicopter
Align Trex 500 Rc Helicopter Torque Tube Gear Tail Boom Mount With Gears
align trex spares 600/550 swash tail grips torque drive unit rc helicopter
TAROT 450 Metal Tail Boom Torque Tube Bearing Linkage for Align Trex 450 DFC PRO
STASRC 500 4Blades Tail Rotor Holder for TREX Align 500 Helicopter
Trex 500 Autorotation Tail Drive Gear: Tarot 500 TL50019
Align T-Rex 500 (Torque Tube) Combo with Motor / ESC
