Description: -The CNC aluminum bottom frame is designed to replace stock plastic bottom frame on the Align carbon fiber frames. The new CNC frame will bring a new look to the Align carbon fiber frame, making it very strong and stand out. -Silver anodizing version.  Includes: -Aluminum CNC bottom frame-All screws included Requires: -Loctite screws (recommend #242)-Assembly Weight: 3.2g Usage: -Align T-REX 250/SE helicopters Instruction: -N/A Features: 100% Precision CNC machined Aluminum Adding rigidity for the stock frame Attractive and stylish design Directly replacement for stock plastic bottom frame.