WATERPROOF: Waterproof and rust-resistant surface made of powder-coated steel. WEATHERPROOF: Outdoor weatherproof design with a steel flip cover and spring-activated hinges to keep mail dry and prevent rust. LARGE CAPACITY: Large capacity with a size of approximately 32x21.5x8.5cm, suitable for parcel delivery and storing newspapers, catalogs, and magazines. SIMPLE AND ELEGANT: Simple and elegant design suitable for home or office use, You can put a name tag on your letterbox is for easy identification. INSTALLATION: Easy installation with 4 screws and 4 plastic screw caps included.