Quantity: one piece Color: transparent Outer size (30x30x4CM) Inner size: 18.5x20.5cm Material: PC Net weight: about 620g Recommended small hole size: 26.7 cm round hole diameter 4 types of locks: (open, off, on or off, locked) Four-mode cat flap with locking switch, rotate only, indoor and outdoor, fully lockable, easy to control and lets your pet in and out. With a cat flap, you no longer need to constantly close and open the door while waiting for your pet to arrive. PERFECT GLASS DECORATION - The clear design makes it suitable for your windows, perfect for windows, sliding glass doors, glazing ideal for all glasses your pets will instantly fall in love with the stylish cat flaps. Simple comfort: There are two parts to the cat flap: the door brush dampens door noise and the inner rubber ring protects your cat damage silent action will not scare pets or disturb the owner. So the cat is free to go to its litter box. Durable and solid: all doors are made of solid ABS plastic, which is weather-resistant and offers great comfort and ease of use . The solid 100 percent UV resistant polycarbonate construction makes the door virtually unbreakable. Good quality product