ITEM NAME:Gimbal Roll Arm Bottom Bracket Repair Module CNC Aluminum for Phantom 4 Pro Description: Made of high quality, very durable for your long time use. High performance and super exquisite workmanship. Light weight and small size, easy to carry. No need to cut drill, easy to install and take out. Replacement for DJI Phantom 4 Pro Roll Arms. Specification: Material: Aluminium Alloy Size: 70x52mm/2.75x2.04inch Package Includes: 1 Piece Roll Arm Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement..Material: Aluminium Alloy. 1 Piece Roll Arm. Light weight and small size, easy to carry. No need to cut drill, easy to install and take out.