4 Way Locking: Our cat flaps with dual knob-style locks offer 4-way modes: open,locked,in-only (cat can enter but not exit) and out-only (cat can exit but not enter),to control pets in and out of your home for youthink pet door Noise Reduction: The cat doors for interior doors is designed with a brush strip to reduce noise when pets comes in or out the door; Silent action will not frighten pets or disturb owner for white screen dog door Beautiful Decoration for Glass Window and Door: catdoor flap is transparent,so after installation on clear glass window/door,they will seems like a whole body; Ideal for installation on glass window and sliding glass door for white screen dog door Fit Cats and Small Dogs: Flap size is 7.25" x 8"; Our small dog door suits all breeds of cats and some small dogs up to 6kg / 13lbs for cat mate glass cat flap Materials: Pet flap is made from high-quality ABS,weather-resistant,sturdy,long lasting; Robust UV stable polycarbonate construction ensures a virtually unbreakable dog door for cat mate glass cat flap