Stylish cat door, perfect for cats and small pets to pass through the door. The cat door is cute. Every child and family will love having it. Give your cat free access to food and litter. Helps limit litter box odor in a room while keeping it easily accessible to your cat. Step-by-step instructions that are easy to install and get up and running quickly. Large size for large cats or large dogs. The frame is made of ABS plastic and can be installed in laundry rooms, bedrooms, basements and any room you wish to designate as your cat. Size: 24CM*27CM*18 1: first draw the size of the door cover with a piece of paper (there may be a few millimeters of error); 2: The drawing is drawn on the door, and it is drawn with a pencil; 3: Use a drill to drill a hole in the four corners of the paint door, then directly use a chainsaw to open the hole; 4: This cat flap is suitable for all popular categories. If it is a glass door, draw the glass with a tool, cut it gently and fix it with glass glue; 5. There are grooves on the back of the cat flap. If the thickness is too large, it can be cut off. If the door is too thick, the long screws will need to be replaced when fixing. 6: The hole is scouring, now make a layer of veneer to wrap the hole to keep it beautiful. 7: Put the cat flap in place, use the accessory screw, tighten it with a screwdriver