Namsan Magnetic Automatic Lock/Lockable Pet Screen Door Dog Gate Way Pet Door for Screens - Larger 12" x 16" Namsan Pet Screen Door: Magnetic and lockable pet screen door, ideal choice for pet owners Reliable Material: Built with ABS plastic, one of the most durable plastic materials Closes Automatically: With built-in magnet, the door is magnetic, ensuring better experience for your pet Universal Pet Door: Fits for all door and window screens. Cat door, dog door, suitable for cats and small/medium-sized/ large dogs Easy to Install: Installation instruction included. It works better to reinforce the frame with glue