PetSafe Never Rust Wall Entry Pet Door - Telescoping Frame - Insulates Better Than Metal, Energy Efficient - Interior & Exterior Walls, Weatherproof, Easy to Install & Clean (White - Large)

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!

***note first: Buy it in the spring so you can leave the flaps open to train your dog. This is a great doggie door. I was scared to tackle the job of putting it in, but it was actually very easy. I love everything about this door. I have small dogs, but I got the 100 lb size just in case we ever got a bigger dog. Installation was easy, and the flaps work perfectly. It's cold right now and because of the magnets, the cold really isn't coming in. You have to train them how to go in and out, because they will have nothing to do with it. This is how I trained them: I taped both flaps up with duck tape. Used incentives to show them there was a hole they could come through. At first they wanted nothing to do with it. Just keep trying, and keep the flaps up. About a week later, I let the dogs out and closed the door. I noticed one used the doggie door to come back in. I left the flaps open for a month so they could get use to it. They actually started using it all the time. (for those of you who worry about bugs, I put a bug zapper on a stool right by the hole, inside) I finally put down one flap, and took the magnet off the bottom (it slides in and out). Again, you have to use incentives to let them know they can push it. Eventually they were going in and out with the one flap. We eventually put the other flap down (with the magnet). They were going in and out. We now have both magnets on both doors, and they use it beautifully. Love this door. If you were thinking about getting one, just do it!

This is the second one of these I've bought over the years. Out two little fuzzy butt-head cats can never figure out how to just push their heads through the flaps, so they end up using their claws to open them and it really destroys the flaps and the surround over time. My last one was so nasty that instead of just replacing the flap, I replaced the whole pet door. The replacement pet door was built better than the original and was about the same price.I've done many pet doors over the years, and this was one of the easier ones to install. Win!

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.

Good directions. Really good quality but does let more air through than I would like. Just don’t think that there is any kind of way to seal it up tight and still let a cat in and out so that is what it is. The solid cover could be fixed so that it doesn’t let air through! Over all it is a good product and do recommend.