This is the Micro Heli Hardened Stainless Steel Tail Shaft and Pulley Set for the T-Rex 450 helicopters.  This will fit the T-Rex 450X, 450XL, and 450SE helicopters.  This is more precise than the stock part for smother opteration, and is also designed to offer more tail rotor pitch for more radical maneuvers.

Features:

• Precisely CNC machined to get best belt mesh and correct belt width
• Longer tail output shaft 3.00mm x 41.00mm to provide enough piro rate
• Precision Grounded +0.00 to -0.01mm tolerance to provide super smoothness and no tail vibration
• Exceptional strong hardened stainless steel material to reduce bending problem of the stock tail shaft
• Designed with set screw to lock the pulley securely onto the tail shaft and offer options to replace new tail shaft if needed without buying a new pulley
• Weight: 1.8g