Description: Convenient Door: This designed for screen windows or doors to allow your pets to get in/out. It's so convenient that they can or outdoor on their own. Self Closing and Lockable: Our door with magnetic can keep the door automatically closed when your dog leaves. You can even lock the door to prevent your out at night or when you are not at home. Sturdy & Durable: Made of high quality ABS plastic and nylon material, resistant to high temperature and low temperature, blocking from flying in, preventing pets from scratching. Screws reinforcement makes our door sturdy enough and never easily fell apart. Easy to Install & Use: Our easy to install. You can install it own. It's also easy for your beloved pets to push or close. Versatile: The door allows you to install into a screen door, window and any areas. It is suitable for all to small/medium size dogs. Specification: Material: Plastic Color: Black Size Chart: L: External dimension: 37x42x2.5cm/14.57x16.54x0.98inch Inner size: 31x36x1.2cm/12.20x14.17x0.47inch S: External size: 24x29x2.5cm/9.45x11.42x0.98inch Inner size: 21x26x1.2cm/8.27x10.24x0.47inch Package Includes: 1 Piece Pet Flap Door   Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!