PetSafe Wall Entry Pet Door - Rust-Free Telescoping Frame - Easy Install for Interior & Exterior Walls 4 3/4" - 7" Thick - Medium - for Pets Up to 40 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!

Installation was easier than I thought and the outcome looks really good. They have good instructions and videos on YouTube to help plan your install. The unit has wide trim to cover the hole you have to cut into the house. Looks good outside and inside. The sliding locking door is also nice when it's cold and snowy out or when we leave or go to bed.Tip: If you have vinyl siding and a power saw, flip the blade backwards. It will cut through vinyl smoothly with no jagged edges.Seems high quality. Durable plastic frame and flaps. I expect the flaps to wear out eventually, but they are working great. And the magnetic seal really helps block some wind when it clicks in place. Since this is a name brand, I know I can find replacements parts easily.And... the dog loves it! It's a game changer with our puppy. He goes in and out as he pleases. No more accidents in the house! And he seems happier. Though he will sometimes drag shoes and socks out in the snow and leave them outside.

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.

***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!