Security Boss Giant Breed Patio Pet Door Large 15 x 28 Flap Insert for Sliding Doors 70-99" Track Heights

I had a hard time finding a patio dog door large enough for my 115lb German shepherd to fit through. Every extra large door I bought was so small he had to squeeze through it. Plus they did not seal well enough to keep the cold out. The flap did not stay closed in the wind and would warp. These were pet safe brand which I'll never buy again. This dog door is high quality top grade, I love it! Security boss is the brand to buy!

Love the door just took two days to get my Dane to use it! It has been a life saver! Keeping the mice frogs and snakes out of my house!!!