Product Overview: Specifications: Color: White Material: Plastic Dimensions product: 20 x 19 cm Features: 1. Updated wiper bar: Provide a fixed groove with a buckle for the wiper bar to securely fix the wiper bar. Even if the brush strip falls off, you can easily reposition it in the mounting groove. This greatly helps the brush bar to reduce noise and prevent raindrops, wind or mosquitoes and other pests as much as possible. 2. Safe and well thought out: the pet can see through the door through the transparent flap. The outer rain seal is waterproof. The brush strip eliminates noise when the door is closed. The 4-way smart door control gives the cat more freedom. The inside edge of the frame is polished to prevent hurting the cat. 3.4-way switch mode: The flap door can be customized with 4 modes: exit, entry, entry and exit , and complete locking. Give the cat as much freedom as it wants. 4. Excellent Quality: Made of weatherproof ABS material, the surface is smooth and durable. Packing List: 1 Cat Flap Installation Method : Tools needed: electric drill, iron or chainsaw, tape measure; Step 1: First, use a piece of paper to record the size of the door cover (there may be a few millimeters of error); Step 2: Draw the pattern on the door and trace it with a pencil; Step 3 : Use a drill to drill a hole in each of the four corners of the door drawn, then start digging directly if you have a chainsaw; Step 4: If it is a door in glass, gently open it with a scraper and fix it with glass glue; Step 5: Clean the hole, now make a layer of scalp to wrap the hole for pretty patterns&nbsp ;; Step 6: Install the cat flap, there are accessory screws, screw them with screwdriver;; Step 7: The screw door is also equipped of a screw cap, press it, OK and it's done! Note: 1. Please allow 0-2cm error due to manual measurement. Thank you for your understanding. 2. The actual color may differ slightly from the picture due to the light and brightness difference on your monitor.