Medium Dog Door for Sliding Glass Doors Doggie Door Insert for Screen Patio Pets Door with Lockable Panel Convenient and Durable Magnetic Closure Easy to Install Ideal for Large Dogs Cats Black

Super flimsy metal. The cheapest part of it though is the plastic 3m taped “T-type lock” that hold on the locking panel preventing the use of the door for unwanted pests. If they break there is no way to secure the locking panel. There should be built in slots just like the plexiglass windows that cover the screen. The other issue was mine came with one corner not snug together the like rest of the corners and I couldn’t get it to pop together. Not worth a return but if I had to do this over I would spend a bit more money on a better option.

I put it in my sliding glass door. Great fit and my 30 lb dog uses it. It keeps cold/ heat out, but my dog can go in and out no problem.

Took my dog a couple days to figure it out but he loves being able to go out on his own. Fits nicely between frame and door.

Easy to install! Knobs to hold up panel could be a little bit in more. The door could be a little lower my Doxie has really short legs.

We got this for our two cats. It's been amazing and now they don't have to use the litter box and stink up the house!