1、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 2、Noise Reduction: The small dog flap 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 3、Beautiful Decoration for Glass Window and Door: small pet door 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 4、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 5、Durable Materials: Pet flap is made from high‑quality ABS, weather‑resistant, sturdy, long lasting; Robust UV stable 100% polycarbonate construction ensures a virtually unbreakable dog door