NOTE! ! !: Please measure your track frame height, track width, pet width and pet height before purchasing. ADJUSTABLE HEIGHT: The adjustable sizing of this doggy door allows it to fit sliding glass doors with heights ranging from 78 3/8 Inch to 82 1/2 Inch, ensuring a perfect fit for your home. SECURE LOCK: Comes with a toggle lock to secure the pet door to sliding door. This ensures safety and prevents gaps between the two doors. CONTROLLED ACCESS: The included closing panel allows you to limit your pet's access when needed, and prevent wild animals from entering your home. DURABLE AND INSULATED: Made with a high-quality aluminum frame, shatter-resistant tempered glass, and a magnetic closure on the pet flap, this dog door is built to withstand the elements and provide insulation for your home.