NOTE! ! !: Please measure your door frame height, track width, pet width, pet height before purchaing. Designed for Small Pets: This patio cat door features a flap opening of 8.94" W x 12.24" H, perfect for small pets up to 40lbs. 7-Foot Adjustable Height: The durable aluminum patio dog door insert is adjustable in height from 78" to 82". The top spring of the dog door is designed to perfectly match the height of your door frame. Durable Aluminum and Tempered Glass Construction: Made with high-quality aluminum and tempered glass, this dog door combines strength and safety, ensuring long-lasting performance and a secure environment for your pets. Convenient Slide-In Panel: The slide-in panel allows you to control pet access effortlessly, and prevent wild animals from entering your home.