Features:1. Made of high quality ABS material, transparent door, convenient to view the situation outside the house.2. External acrylic material surface is smooth, strong, sturdy and durable.3. Easy to install and operate, convenient to use.4. Fast iron absorption positioning, silent brush, classic square appearance design, simple and beautiful.5. Four types of rotation, convenient and practical.Specification:Condition: 100% Brand NewMaterial: ABS + AcrylicOptional Color: White, Black, BrownSuitable for Pets: Cats Outer Door Size: Approx. 27x23.5x5.5cm/10.63x9.25x2.17inchInterior Door Size: Approx. 19.5x18cm/7.68x7.09inchFour Different SettingsOnly in: the white dot rotates to the cat outside the sign positionOnly out: The white dot rotates to the cat inside the sign positionIn and out: the white dot rotates to the circle sign position.No in no out: the white dot rotates to the lock position.Install Steps: 1: Use a piece of paper to draw the hole size on the door.2: Use a drill to drill a hole at the four corners of the door, and then use a electric saw to cut the hole directly.3: The appropriate cutting range is about 3~6mm, such as small cat door 1~3mm.4: Fix the cat door with double-sided adhesive tape, (with accessories screw), and screw it with a screwdriver.5: Equipped with screw cover. Press it and finished.If it is a glass door, using the glass tool, gently cut, using the glass glue fixed.Package List:1 x Pet Door1 x Manual4 x Double-sided Adhesive Tape 8 x Screw Cap16 x Screws