4-Way Lock: Our cat flap with double knob lock offers 4-way modes: Open, Lock, Entry Only (cat can enter but not exit) and Exit Only (cat can exit but not) to control pets Doors in and out of your home for you think pets Noise Reduction: The indoor door cat door is designed with brush strips to reduce noise when pets come in and out silent motion won't scare pets or disturb owners of white screen dog doors Beautiful decoration for glass doors and windows: The cat door flaps are transparent, so when installed on clear glass doors or windows or doors, they look like one unit ideal for installation on glass windows and sliding glass doors for white screen doors dog door Fits Cats andamp Puppies: Flap size is 7.25" x 8" our puppy doors fit all breeds of cats and some puppies up to 6kg or 13lbs and are suitable for cat companion glass cat flaps DURABLE MATERIALS: The pet flap is made of high quality ABS, which is weather resistant, strong and long lasting the sturdy UV stabilized 100 percent polycarbonate construction ensures that the dog door of the cat companion glass cat flap is virtually unbreakable