Description: -The new CNC tail rotor from MicroHeli is designed to replace stock plastic tail rotor of the popular E-Flite Blade 400 helicopters. It is made of strong aluminum and machined at very high accuracy to provide highest tolerance fittness. All screws, bearings and hardwares are selected with highest quality. Nylon lock nuts are used to better secure the tail rotor blade grips at high tail rotor rpm. -Blue anodizing version. Includes: -Aluminum tail rotor -Precision aluminum balls -Precision ABEC-5 bearings -Lock nut provided for extra safety -All screws included Requires: -Loctite screws (recommend #242) -Assembly Weight: 5.2g Usage: -E-flite Blade 400 helicopters Instruction: -Included in the package Features: 100% Precision CNC machined Aluminum Precisely machined and tightly quality controlled Zero slop or play Directly replacement for stock plastic tail rotor.