Give your pet convenient access with the Helhom Sliding Glass Patio Dog Door Insert, designed for medium-sized dogs up to 50 lb. and featuring an adjustable height from 75-7/8 in. to 80-11/16 in. for compatibility with a variety of sliding patio door tracks. The durable design combines a high-quality aluminum frame, tempered glass window, upgraded metal cover and temperature-resistant hinge structure for dependable everyday use. Its pet flap measures 10-1/4 in. wide by 16-1/4 in. high, providing comfortable passage for compatible pets, while the lockable panel lets you restrict access when needed. Designed as a non-permanent sliding door insert, it installs without tools for convenient setup and removal, making it especially practical for renters and anyone seeking a flexible alternative to permanent pet door installation.