1Heavy Duty Design: The compartment door is made of aluminum alloy frame and Asa sandwich panel, with electrostatic spraying force, anti Uv, anti rust, and has good heat and sound insulation properties. 2180 Degree Opening: The storage door cover can be opened at 0 to 180 degrees to help you to store larger items in the warehouse, a direct replacement for old and damaged storage doors. 3Weatherproof: Sealing strips are installed around the door to ensure a complete seal of water resistance and shock absorption. There are no exposed external fasteners, making the exterior lines of the Rv smoother. 4Security Lock: With a safety lock and 2pcs matching keys, locking the compartment is a great way to deter any unwelcome intruders and give yourself peace of mind. 5Applications: 500 x 300mm / 19.7 x 11.8in large door cover, suitable for installation thickness of 25?55mm / 0.98 ? 2.17in, Applicable to Rv, trailers, camper, motor home, etc.