The Devil Design TPU 1,75 ALUMINUM is a super lightweight aluminum upgrade for your 1.75” frame arm. It provides strong, lightweight, and all around protection for your multicopter frame, helping to ensure your components last longer. The aluminum is designed with an aggressive look that gives your drone a unique, stylish appearance. This upgrade also includes all the same benefits of a regular TPU arm, such as being flexible and providing shock absorptivity. It's easy to install and includes all the necessary mounting holes and hardware.