DJI Phantom 3 Gimbal Yaw & Roll Arm Replacement DIY KIT HRC55 Aerometal Al-Mg-Si Alloy CNC Manufactured ( 2PCS SET ) MADE IN USA For DJI Phantom 3 Advanced & Pro Roll Arms Replacement HRC55 Surface-anodized Aerometal Aluminum (Al-Mg-Si Alloy, CNC Manufactured Made in USA Easy Installation Light Weight