Size: Pet screen door outer frame: 24cm x 29cm; inner frame: 20.5cm x 26cm; Suitable for small/medium dogs or cats. Material: Made of high quality ABS material, which is safe, non-toxic and durable. Provide Your Pet Independent Passage: There is a magnet at the bottom of the door frame, the pet screen door can be automatically closed after the pet walks through the door. Two sliding locks on the bottom of the flap help you lock the dog screen door, ensure your pet stays inside the house when unattended. Easy to install: Available in kinds of screen door or screen windows; Install the pet screen door in a suitable place according to your dog's size and fix it with screws. Instructions included in the product packaging. Using suggestions: Please bend the inner flap slightly when inserting it into the outer frame. And teach your pet to enter/exit through the screen door. product description If you want to give your pet enough freedom, come to Namsan, a pet company that has unexpected surprises in store for you. Namsan pet door consists of three parts, easy to install. Constructed from sturdy plastic and ABS material for a durable Namsan pet flap that can withstand daily use and won't warp in extreme temperatures, the high-strength magnet can effectively prevent the screen door closing problem. It is specially designed for puppies, cats and is suitable for doors and windows, it is the best choice for all pet families of company. With our dog flap, you no longer have to worry about your pet's free activities. Size: Frame dimensions: 29 x 24 cm Flap size: 26 x 20 cm Package includes: 1 x Namsan Screen Door