[Premium Material] Super hard plastic and screws will hold the dog screen door firmly; heavy duty pet flip door with high quality locking tabs allows you to mount your exclusive door to the interior or exterior wall when your pet passes through the door it will automatically close. [Easy Training] The transparent flip cover lets your cat see her food or litter box on the other side of the door, making training and adaptation stress-free. What's more, the flap is wrapped with a brush strip to reduce the noise and force of the cat's push. [Easy to Install] You can install it directly to your existing screen door, window or porch screen for quick and easy installation and blend in perfectly with your existing screen. [4 SWITCH MODELS] Four independent models, lock cat flap door with switch, swing only. Fully locked inside and outside, easy to control pets in and out. Parts List: 1Pet Screen Door Product Name: Pet Screen Door Main material: plastic Size S: Frame size: height 29 width 24 thickness 1cm (suitable for small dogs and cats) Inner door size: height 24 width 19cm Colour: Black notes: 1. Due to the difference of different monitors, the picture may not reflect the actual color of the item. 2. Due to different manual measurements, please allow slight size differences. Thanks for your understanding.