Convenient Pet Screen Door: Inside size 26*20.5cm outside size: 24x29cm.This pet screen door is designed for screen windows or doors to allow your pets to get in/out. It's so convenient that they can get indoor or outdoor on their own. Self-Closing Lockable: Our dog screen door with built-in magnetic can keep the door automatically closed when your dog leaves. You can even lock the door to prevent your pets go out at night or when you are not at home. Sturdy Durable: Made of high quality ABS material. Screws reinforcement makes our pet screen door sturdy enough and never easily fell apart. It can last for long time. Easy to Install Use: Our dog screen door is easy to install. You can install it by your own. 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 into a screen door window and any other screen areas. It is suitable for all pets up to small/medium size dogs.