Description: -One of the most breakable parts on the Blade CX is the plastic battery tray that is very annoyable when replacement and causing a lot of vibration if the battery is not fully secured. The CNC aluminum battery tray is designed to virtually eliminate the chance of breaking the battery tray by machining the battery tray with strong aircraft aluminum material. It is designed to improve durability of the battery tray on E-FLITE Blade CX and CX2 helicopters. -Blue annodizing version. Includes: -CNC Aluminum battery tray set -All set screws and allen keys included Requires: -Assembly Weight: 6.6g with sets screws Usage: -EFLITE Blade CX/CX2 helicopters Instruction: -Included in the package. Features: Precision CNC machined aluminum. Strong aluminum parts to virtually eliminate the chance of breaking of the battery tray. Designed light weight, strong and stylish. Fully secure the battery to avoid any vibration during flight.