Practical Pet Screen Door: Inner dimensions 26*20.5 cm, outer dimensions: 24x29 cm. This pet screen door is designed for screen windows or doors to let your pets come in/out. It's so convenient that they can enter or exit on their own. Self-Closing & Lockable: Our dog screen door with a built-in magnet can keep the door automatically closed when your dog goes out. You can even lock the door to prevent your pets from going out at night or when you're not home. Sturdy & Durable: Made of high-quality ABS material. Screw reinforcement makes our pet screen door sturdy enough and never breaks. It can last a long time. Easy to Install & Use: Our dog screen door is easy to install. You can install it yourself. It's also easy for your beloved pets to push or close. Versatile: The pet screen door allows you to install your pet screen door in a screen door, window, and any other screened areas. It's suitable for all pets up to small/medium-sized dogs.