Small Size: Outer Size: 19 x 20cm (W x H); Inner Size: 14.5 x 15.5cm (W x H); Cutout Size: 16 x 17cm (W x H) ); Suitable for cats up to 16 lbs, suitable for any wall or door up to 50mm thick; Cat Door: A great solution for giving your cat access to any interior space while giving you full control. Perfect for accessing the bedroom or even accessing food or litter when kept behind closed doors closed to prevent dogs and children from entering. Simple and good design: the transparent flap allows the pet to see through the door. The outer screen is waterproof. The brush strip reduces noise when closing the door. Easy Installation: Full instructions allow for easy installation in windows, doors, closets, etc. 4 switch modes: switches on-only, on-only, on-and-off, and fully interlocked, easily control your pet’s entry and exit
