Pets can come in and out freely: The fly screen door pet flap is equipped with a magnet on the bottom to close automatically. Two sliding locks on the bottom of the flap help you lock the dog door to keep your pets when you're not around. EASY TO INSTALL AND USE: Our dog screen door is easy to install. You can install it yourself. Your beloved pet can also be pushed or approached. Dimensions: inner frame size: 28 cm x 33 cm; outer frame size: 34 cm x 44 cm, please choose a suitable installation position according to the size of your pet. This applies to most and dog breeds. MULTI-FUNCTIONAL: The pet screen door allows you to mount the pet screen door to screen doors, windows, and any other screened area. It is suitable for all pets up to small to medium . Sturdy and Durable: Made of ABS material. Screw reinforcement makes our pet screen door strong enough not to fall apart. It can last a long time. Colour:black Material:ABS Package Contents: 1 x window door Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.