COZITOAluminum Sliding Glass Pet Door Insert, Adjustable Height, Small

Give your small dog or cat the freedom to come and go with this adjustable dog door for sliding glass doors, featuring a sturdy aluminum frame and tempered glass panel that seamlessly integrates with your patio door. Designed for easy, tool-free installation, it simply slides into most standard door tracks and adjusts in height from 75 7/8" to 80 11/16", making it an ideal, non-permanent solution for renters and homeowners alike. The upgraded hinge-structure flap stays flexible and functional even in low temperatures, while the metal cover and secure locking mechanism help you control access and keep your pet safe when needed. With a generous flap size of 8 1/4" x 12 1/4", this medium model (CWM03-M) offers a comfortable passage for small dogs and cats, combining durability, convenience, and a clean, modern look in one reliable pet door.