VEVOR - Dog Door for Sliding Glass Door, 75 7/8" to 80 11/16" Adjustable Height, Aluminum Alloy Frame with Flap and Lock - White

The 180° full-opening design fits narrow hallways and compact spaces, letting you move bulky items straight through the sliding door. High-density felt seals on the frame and flap help block outdoor heat and cold, while premium metal hinges resist warping and sagging for lasting performance.