Feature: 1. The pet door can help you control the entry and exit of your pet. It is very suitable for the bedroom. And this door is suitable for pets weighing less than 15 pounds or less. 2. The buckle slot fixes the windproof wiper strip, which can effectively reduce noise and prevent insects such as rain, wind, and mosquitoes from entering. 3. Easy to install, and the tunnel depth can be reduced according to your installation needs, suitable for installation in indoor doors, outdoors and other places. 4. 4 kinds of lock switch modes, easy to control your pet in and out, when the pet passes through the door, the magnet at the bottom will make it automatically return to the original. 5. It is made of high quality ABS material, with strong durability, don't worry about naughty pet door damage it, it will have a longer service life. Specification: Item Type: Pet Door Material: Plastic Outer Door Size: Approx. 25 x 5.2 x 27.6cm / 9.8 x 2.0 x 10.9in Inner Door Size: Approx. 20 x 22.5cm / 7.9 x 8.9in Package List: 1 x Pet Door8 x Screw8 x Nut 1 x Double-Sided Tape1 x English Manual Note: 1. Please measure the cat's weight and waistline before placing an order. Make sure that the weight of the cat should be less than that.2. If the rotating shaft is stuck in cold weather, just drop a few drops of oil (not freezing) and you will find it returns smoothly.3. Please allow 1‑2in error due to manual measurement.Thanks for your understanding