PetSafe Adjustable Height Sliding Glass Pet Door
This door can fit door tracks up to 80 11/16 or 96 inches. The flap opening is 8 1/4" W x 13 3/16" H for pets up to 40 lbs. Made with weather-resistant aluminum and shatter-resistant tempered glass. Price drops from $184.99 to $152.95 w/ free shipping.