Dog Door for Sliding Glass Door 75 7/8"-80 11/16" XL Adjustable Height - Pet Door for Large Dogs - Sliding Door Doggy Door with Metal Cover

【Durable Metal Construction】: Constructed with a heavy-duty metal cover and robust aluminum frame; ensures long-lasting performance and resistance to weathering; provides superior durability compared to plastic alternatives; suitable for consistent pet use. 【Adjustable Height & Size】: Height adjustable between 75 7/8" and 80 11/16"; flap size measures 13 5/8" x 23 5/8"; accommodates medium to large dog breeds; designed to fit most standard sliding glass door tracks with ease. 【Secure Locking Mechanism】: Features a secure locking system to control pet access; prevents unwanted escapes and ensures pet safety; allows you to restrict outdoor access during nighttime or when unattended; easy to operate. 【Easy Installation Process】: Slides directly into existing sliding door tracks; requires no tools for installation; ideal for renters or homeowners seeking a non-permanent solution; simple and straightforward setup with included instructions. 【Tempered Glass & Cold Resistance】: Includes a tempered glass window for increased impact resistance and safety; upgraded hinge structure prevents cracking in low temperatures; maintains functionality and integrity in all seasons; designed for long-term use.