Simply the best and easiest to use Pet Patio Panel. Beautifully designed, high quality patio pet door panel inserts into the frame of your sliding glass door and automatically adjusts to the proper height. Features a heavy-duty aluminum frame, sliding door weatherstrip and weather seal, tempered safety glass, energy conserving Ultraseal replaceable transparent flap, multiple ceramic magnets ensure the flap always closes completely and the locking panel lets you restrict your pet's use both inside and out. Plus, our patio panel doors feature a reversible lock for right opening or left opening patio doors. Fits sliding glass door frame openings from 77 3/4" to 82". Offered in a variety of sizes and colors.