1.Note:Please measure your track frame height, track width, pet width and pet height before purchasing. 2.Made with a high-quality aluminum frame,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. 3.Adjustable The Frame Height from 81.69 to 86.61 . 4.Fits vinyl slider tracks with 1-1/4" or greater track width and will take up 18.31 in your slider opening. 5.Sense of security:Come with 1pcs panel that can slide up and down and be locked,offer your pets the freedom to explore the outdoors while keeping your home secure and comfortable with the Pet Door. 6.Perfect for XLarge Pets: The semi-transparent flap of the pet door for sliding glass doors, measuring 15.16 W x 23.7 H, offers a clear view and easy access for pets up to 200 pounds.