Perfect Replacement Metal Side Door Cover: Ulanzi battery cover can provide better protection for your gopro 9 10 camera in various environments. Tailored for the Gopro Hero 9 10 Black camera, it is very suitable and protects the battery from damage. CNC Aluminum Alloy Material: Lightweight, Durable, not like plastic material, not easy to break, can effectively resist the damage of sharp objects, and effectively protect the side of the camera.