PetSafe Never Rust Plastic Doggie Door for Install in Interior and Exterior Doors or Walls, Paintable, Easy Install, Closing Panel Included, for Pets Up to 40 lb, (Medium)

We have 7 dogs and they range from 20 pounds to around 110 pounds. They all come through the door just fine. Even the 110 pounder has lots of extra room to fit through. I have installed many doggy doors throughout my house and in both of my outside doors. This certain doggy door is great for an inside door. For outside doors, I use weatherproof doggy doors. The flaps are heavier and most normal winds will not blow them open.To install the door, I did the following:Remove the door from the door frame and lay it on saw horses or whatever you have to work on. It needs to be at least a foot off the ground to complete the install. Mine was about 3’ off the ground. This keeps you from having to bend over so far to work on it1. I measured the height of my largest dog standing at her shoulders, then added 2” to give a little extra clearance. I took a pencil and made a light straight line across the door at that point.2. Next, I measured the width of the door and marked the center from the top line down to the bottom of the door.3. Next, I laid out the stencil, that comes with doggy door, and lined the center arrows up with the center line on the door and the top of the stencil with the top line I made going across the door. I held the stencil in place with some masking tape. 4 little pieces will do the trick.4. Next, I traced around the stencil with a black sharpie. This makes it easier to see where to cut the door out. Don’t worry about the black lines, what’s left of them will be hid by the frame of the doggy door. Remove the stencil when done.5. Next, I used a 1/2” drill bit and drilled a hole inside each of the corners of my lines, getting as close to the corner lines as I could.6. Next, I used a jigsaw and cut out the hole for the door. Stay on the lines as best as you can and make sure the foot of the jigsaw is flat so your cut will be straight through to the other side. When I got both sides and the bottom cut, I used a screwdriver to hold the bottom of the piece I was cutting out so it didn’t fall when I cut the top. If it falls before the cut is finished, it could break off a piece of the main door. That will make it look bad with a chunk missing out of the main door when you are finished.7. Next, measure the thickness of the main door and write it down. Add 7/8” to that measurement. My door thickness was 1 3/8”. I added 7/8” to that and got 2 1/4”. That is how wide I cut the plastic spacer pieces that went between the frames of the doggy door. Try to be as accurate as possible with this. I used a utility knife to cut the spacers. Take your time so you can make straight cuts. Make several cuts on the same line, then fold it over and it will break apart on the cut line.8. Slide the plastic pieces into the slots of the front frame section. Push them in tight. Set the frame in the cutout section of the main door. Then, install the back frame section by lining up the plastic spacer pieces with the frame slots and hold them tightly together. My wife helped me with this part by holding the frames together as I installed the plastic screws and nuts in the frames. I put the top center one in first, followed by the bottom center one. Slightly tighten these 2 but not too tight, you may have to adjust the frame position. After that, she didn’t have to hold it any more. I installed the rest of the screws and nuts. After making sure I had the frame squarely adjusted, I tightened the screws and nuts.9. With a pair of wire cutters, cut off the excess of the plastic screws. Next, I used a Dremel with a cutoff wheel to grind the rest of the screw down flush so the dogs wouldn’t scratch themselves on them.10. Clean the sawdust off the door and install it back on the door frame that you removed it from.

Exactly what I was looking for, nothing fancy but functional. The large size is up to 100lb dog but mine is 75lb and I’m not sure a dog much bigger than him would be comfortable so I would size up if yours is larger. Installation was very simple and straightforward. I used a sawzall rather than a jigsaw they recommend and it was fine as long as you’re steady and comfortable cutting. I opted not to remove my door from the hinges and it worked out just fine. I would just recommend having a second person to help click the two sides of the frame together if so.

Works very well. I have a Large German Shepherd who is 7 years old and the door is large enough that he does not really have to duck down much at all to go through it. Instructions, A Template and Nylon Plastic Hardware which allows or flexibility in aligning the holes rom one side to the other. The Door Flap is made well and has a hinge to allow proper swing without early wear.

I bought this to replace one that I had before that I could never get the right replacement flap for. I like the little solid piece that comes with the clamps over it to keep your animal in and others out when you want to close it. The plastic part that goes in and out is not so stiff like some of them in the hard plastic this one's a softer plastic. I don't like the hard plastic ones cuz I don't want my animal to get stuck in the doorway part way out when they try to pull their head back in. This material is much better for these little doors. This one was purchased for a cat. It has a little magnet on the bottom and whenever the animal goes out the door swings back and catches the magnet on the bottom to keep it closed. I noticed they come in a lot of different sizes but this little one was perfect for a cat and it's the same size as the one I had before when I had chihuahuas.

Nice doggy door! Well made and looks good. The flap is tinted, so my pups were a little hesitant to go through it at first. Had a clear one before. I have a small terrier mix and the small door seemed too small so I installed the medium and very happy with it.

Works as described and super easy to install. We purchased this because our dog likes to go into the bathroom when no one is home and then shut the bathroom door fully behind him, which of course he then freaks out and complete demolishes the door. So this has fixed that issue so far.

I can't give it 5 stars because when closed, with the plastic cover on, my cat easily pulls the plastic cover off and gets out. I have to barricade it so he doesn't get out overnight. What good is it? If you get a Petsafe pet door, make sure you get one with the metal cover that slides on. I wish I had..

Both my dog and cat use our doggie doors for upstairs and downstairs, entering the outdoor greenhouse plus the main bulkhead door! It really makes our lives easier!!