The CNC Delrin Main Gear with Aluminum Hub set design was to optimize for weight, stability, durability and overall performance of the BLADE 230S / V2 / Smart / REVOLUTION 235 CP helicopter. It is directly replaced the stock plastic. The new upgrade utilizes high-end CNC machining, to produce tight and accurate tolerances throughout the part, from Delrin and Aluminum materials. With its stylish look, outstanding features and design, CNC high-performance part and more, get ready to experience the next level of the CNC Delrin Main Gear with Aluminum Hub set by Microheli. Note: This main gear for BLADE 230S V2 is thicker 1.1mm than the main gear for BLADE 230S. Includes 1 x CNC Delrin Main Gear with Aluminum Hub set Hardwares Materials Delrin Aluminum Features Optimizes for weight, stability, durability and overall performance Utilizes high-end CNC machining, to produce tight and accurate tolerances throughout the part Simple and easy set-up Directly replaced the stock plastic Unique and stylish CNC Delrin/Aluminum material Weight N/A Usage Use for BLADE 230S / V2 / Smart / REVOLUTION 235 CP Requires Read and follow the Assembly Instruction carefully Loctite (#242 is recommended) is required to apply to all mechanical screws for safety precaution Basic hand tools Instruction Manual and Instruction included