Door flap is made of ABS material, transparent door, strong door flap is easy for your pet to open. 2 The outer frame is made of acrylic material, which is safe, smooth, sturdy and durable. 3Four ways of rotation make it easier for pets to enter and exit. 4 magnets for quick positioning and a silent brush on the door flap side, which will not make any sound when in use. 5Can be installed on the door or wall, it is a great gift for your lovely dogs and cats. Features: 1. The door flap is made of ABS material, transparent door, solid door flap is easy 2. The outer frame is made of acrylic material, safe, smooth surface, strong and durable. 3. Four rotation modes make it convenient for pets to enter and exit. 4. The magnet can be positioned quickly, and the door flap side has a silent brush, which will not make any sound when in use. 5. Can be installed on the door or wall, a great gift for your cute dog, Specifications: Material: ABS + acrylic Optional colors: black, brown, white Size: approx. 43x36x5cm/16.9x14.2x2in Installation steps: 1. Use tools: pencil, ruler, pliers, electric saw, drill, screwdriver, tape measure. 2 In order to facilitate the installation of the dog door, the door can be removed to install the pet door. 3. Cut the paper template along the dotted line and paste the cut paper template onto the door. 4. Then draw a square line with a pencil 5. Use a drill to drill four holes on the four square corners. 6. Use a wire saw machine with a saw blade to insert the hole into the square wire cutter and remove the door panel. 7. Place the door frame inside the pet door into the open door hole 8. Mark four holes on the door with a pencil 9. Use a drill to punch holes around the marked locations to thread the door through. 10. Place the inner door frame of the pet door into the door. From the door hole below, install the screws. 11. Install the dog door, then install the door 12. Installation is complete. Packing list: 1 x Pet inner door 1 x Pet outer door 4 x Nuts 4 x Screws 1 bag x Washer 1 x Instructions