Description: Suitable for installation on doors and walls. Soft flap pet doors, flexible and safe,preferred by most pets. Made of durable ABS plastic,weather-resistant,low maintenance and very easy to clean. Easy to use and install,allows your pet to come and go freely. Use weight range: 14 kg or less (regular advice) Specification: Material: PP Plastic Color: White,Brown Size: Approx. 20 x 3 x 22cm / 7.87 x 1.18 x 8.66inch;Door:Approx. 15.5 x 15cm / 6.10 x 5.91inch Usage:1.First use a piece of paper to draw the size of the door cover (may have a few millimeters of error) 2.Put the drawing on the door and mark the outline of the door for cat by pencil; 3.Drill a hole in each of the four corners of the painted door, and then cut the hole with a chainsaw 4.If it is a glass door, use a glass-cutting tool, gently open it, and fix it with glass glue. 5.Put the cat's door on it, screw it with accessories and screw it on with a screwdriver 6.Screws are also equipped with screw caps, press on. Package Includes: 1 Piece Dog Flap Door. Note: Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Meanwhile, please be reminded that due to lighting effects, monitor brightness, contrast settings etc, there could be some slight differences in the color of the pictures and the actual item.