PetSafe Wall Entry Pet Door - Rust-Free Telescoping Frame - Easy Install for Interior & Exterior Walls 4 3/4" - 7" Thick - Large - for Pets Up to 100 lbs

We bought this to put in the wall of our garage for our 3 cats. It's awesome. We taped it open when we first installed it so the cats could get used to it without the flap. We probably tapped it up for too long because when we took the tape off the flap were curved a little bit but that was our fault. It does comes with a stable door so if you need to keep animals in or out you simply slide that in. It has been installed for almost a year and has seen heavy rain, snow, below zero temps and temps in the high 90s and it's still in perfect condition. I would recommend this to anyone.

Easy to install. We got this for our 55lb bulldog with very wide shoulders and he fits just fine. He actually fit through the smaller one but it was several years old and time to replace. It looks nice and I like the double flap to keep hot and cold air out. We frequently use the block door when we need to. Good buy!

Easy to install and a quality door.

We have an elderly dog who has to go out about every two hours, and two cats that we raised from feral kittens. When we lived in Hawai'i we just left a door open all the time, but now that we've moved to the mainland we are facing harsher weather. In fact, right now it is 15 degrees with 5" of new snow on the ground. An open door is not an option.This doggy door claims to be relatively energy efficient, easy to install, etc. Of course, they all do. The compelling advantage of this one was the availability of an installation kit, which turns out to be nearly useless, but that's another story.Moving on.Installation requires special tools and some patience. By "requires" I mean you absolutely must, it's not an option.Cutting the hole in the inside wall is easy with a drywall knife or keyhole saw. Intimidating, and you need to be wary of electrical and plumbing things, and it's messy, but easy. Just measure carefully and done.The outer wall is another story. Our house is stuccoed on the outside. Stucco is tough. The door kit includes a special cardboard template that you slide in to mark holes to cut the outer wall, which sounds good, but transferring the cut template isn't quite as easy as they make it sound. You still need to measure.Cutting stucco is easy with the right tools, impossible without. The instructions suggest a stucco saw, whatever that is. Nobody I know ever hard of such a thing. I used an angle grinder and a carbide wheel, both from Harbor Freight. $35 will buy both. You might never need them again, but trust me on this, you need them now if you are cutting stucco, brick, cement, or the like. Nothing else will do. The carbide blade goes through the stucco and reinforcement like it was cream cheese. I suppose a wood, aluminum, or vinyl outer wall would be easy with a saber saw.This is where you find out how well you transferred the inside location to the outside. In my case, I was off by about ½", which is well within the tolerance of the door.The two pieces telescope, and can fit a wall up to a bit over 7", which is what a wall framed with 2X6 lumber will be. They sell another bit to extend it for thicker walls, but frankly, I'd move at that point.Following the instructions, I put a wooden brace, not included, under the door, bridging the inside and outside walls. Lots of things about this are "not included."Throw away the installation hardware and use good wall anchors and screws, and slather a whole tube, or more, of silicone sealer on the flange of the outer part. Don't bother with the installation kit, just buy some silicone sealer and be done. When finished, you have a tunnel connecting the inside with the outside.Now, the fun part; convincing the pets that this is their door.Initially, I did not install either door flap, but left it open as a tunnel.The dog figured it out right away; a couple of times with treats on the other side and she's got it. The cats, not so much, but after a week of being absolutely refused entry or exit through a people door they reluctantly began using the tunnel. Remember, it's a tunnel, not a hole, so it can apparently be something for a cat to fear.Cats like to see where they are going, so the next step was to drill new mounting holes in one of the flaps so that it could be installed with a 1" gap at the bottom, so the cats can see what's outside.The supplied flap mounting hardware is a bunch of self tapping screws that screw into a plastic strip. The plastic cracks and the screw heads just pull through the door flap. Another trip to the hardware store to get epoxy for the plastic strip and small washers for the screw heads, not included. There is no way the supplied hardware was going to work as-is. buy those now, ⅛" or #6 washers, 9¢ at Ace.Once more with the cats, another week or so of enticing, refusing passage through real doors, and they very reluctantly began us sneak through the flap, after spending interminable time inspecting it. The dog, of course, just plows through. In fact, she seems to think it's some kind of agility thing, and will go back and forth for the entertainment value.Now, after two weeks of training, I installed the flap (still the outer one) in its normal location. No issue for the dog. She just walks through. Not so the cats.A cat will paw at the top of the flap for a while until somehow it swings out a bit at the bottom, peer out, and maybe go through, maybe not. There does not seem to be a pattern. I don't know if we have dull cats or if they are all this dim. If this is normal, how do they ever survive?Fortunately, the magnet seal on the outer flap is good enough that there is no perceptible breeze coming through with just the one flap, so at this point, I'm not inclined to install the second, inner flap. It would probably drive the cats crazy. More crazy.The animals do drag in a bit of dirt and snow or whatever is going on outside, so it's good that I installed this by a tiled floor. The inside of the tunnel gets filthy, but it mostly wipes clean. And being a tunnel instead of a hole, it's a bit more trouble for the elderly dog to navigate. Still, all in all, it's worthwhile, even if the cats don't appreciate it.

Kitty wasn't happy to find a new door where a wall used to be and still tries to use her old door, but you can teach an old cat new tricks!! This door is as expected. It telescopes from about 4" wide to about 7" wide (see exact specs in photos for the item) to fit the width of many different types of walls. That range is for the width of the wall it will go through, not the width of the item itself. It "telescopes" to fit the hole you'll cut through the wall/depth.There are two flaps to help keep out the air/weather. Both have magnet flaps to help them close. They are a very thick rubbery material. So you have to train kitty to go through them both - but we just prop one open with a stick since she's already used to going through a single flap on the current door. She'll catch on soon and then we can just let the other hang normally.There is a hard plastic piece that comes with it as well so you can fully close it off if/when you need to (night time, bad weather, winter, etc).Ours is in a pantry so it actually creates a little "sky-light" type of effect in the wall where the sunshine comes through.It'll be just fine for kitty - and she'll figure it out soon.

I will give it a good review because the quality of the product is not the issue. I have two skinny cats and two medium size ones. THINK LONG AND HARD BEFORE YOU INSTALL THE SMALL PET DOOR ...I've always gone with the large ones for large kitties large ones for large dogs but I was trying to get a smaller opening that only the cats would fit through. Usually you can pick a cat up and kind of shove them through one or two times and they get the idea and they go for it this one is so small that if you tried to... introduce shall we say a kitty cat to this very small and very short opening well the only thing I can think of is "good luck". That's on me I did measure their chest width and they can lower themselves down and squeeze through but they won't. I've caught one of the thin ones using it one time it's almost at level with the ground so not much of a drop-down. They keep wanting to use the very large one that the dog comes through that is not in a shut off area so this did not solve my problem of over exuberant pitbull puppy 15 months old jumping all over them. So think really well about it before you try for a situation solve that involves keeping one size of an animal out and letting another size of an animal in that the small one might not be an option at all. My 7 lb Chihuahua, long skinny legs, not tall by any means is taller than this including his head height, none of them like that at all. It's been a few weeks and they still are just refusing it. Even if I make it the only opening into the house they just do not use even if it's pouring down rain they do not like it. Never had this problem before with any of the other sizes. Again the quality of the item is fine but I would definitely go with at least medium.