Specification: Suitable weight: All cats and small dogs(6kg / 13lbs ) Material: Durable ABS plastic, safe.Flap size:7.25x8x1.2inch Door size:11.8x11.8x1.6inch Package Included:1 x Pet Door for Glass Window 3 x Short Screws 3 x Long Screws 3 x Screws Cap Note:1. The product is not suitable for installation in the screen door; 2. The glass door can be installed by glass glue, or it can be fixed by screws; 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. 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. 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. 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. Durable Materials: Pet flap is made from high‑quality ABS, weather‑resistant, sturdy, long lasting; polycarbonate construction ensures a virtually unbreakable dog door.