Designed for Large Pets: The dog door flap measures 13 5/8\" x 23 5/8\" (346 x 600 mm), providing a spacious and comfortable passage for your pets. Whether you have medium or large-sized dogs, this flap size easily accommodates them. Adjustable Height: The dog door for sliding glass door supports height adjustment between 75 7/8\" - 80 11/16\" (1927 - 2049 mm), allowing it to fit a variety of door frames. This simplifies the installation process, making it easy for both beginners and experienced users to set up. Built to Last: The doggie door for sliding door features an upgraded metal cover for enhanced durability. Its new hinge structure ensures the flap remains intact even in low temperatures, providing a long-lasting and reliable entryway for your pets. The high-quality aluminum frame and tempered glass window create a strong and aesthetically pleasing structure. Secure Locking Design: When you need to limit your pet\'s movement, the secure lock design allows you to easily lock the sliding door dog door, preventing unauthorized access. This feature is especially useful during nighttime, when you\'re away, or in specific situations to ensure your pet\'s safety at home. Easy Installation: Designed for convenient installation, the pet door for sliding glass door easily slides into your patio door track without the need for tools. It fits most sliding door track heights, making it a perfect solution for renters or anyone seeking a non-permanent option.