It did fit lengthwise but could not use the brackets to secure the fit on my frame. The top spring fit piece is what holds this unit place with using backer rod foam I had on hand which I put on one side of unit(wall side) to keep centered on track. My dogs do love it after about three days of learning how to go in and out of the dog door!

[This review was collected as part of a promotion.] This couldn't come fast enough. We have 3 dogs always wanting to go in and out. We visited a friends recently and they had this door. Since we have purchased no more constant up and downs with letting the pups out. Great quality

Easy to install. Dogs love it and so do I. Makes life easier !!

We needed a dog door for our Doberman Zahara to be able to go in and out during the day and had no place to put a conventional one. Our only logical exit was the Sliding Glass Door or cutting a hole in the wall out to the back porch and we weren’t doing that. We are so glad we found this removable panel that fits perfectly into the sliding glass door opening. It’s not a perfect seal but has very little open area between the door and the panel. It’s very easy to put in just lift the spring top in top and bottom grooves and slide as far to the door frame as possible and shut the door up next to the panel. Zahara loves it!!!

This is a great product that does exactly what it says, but its not without fault and its not without understanding the size of this door insert. This is large and will take up about half the opening size of the sliding door, enough that it will fit a large dog as stated, but hard for a human to get by the open side. I was able to remove the outside handle on my sliding door as well as the mechanism that controls how far my door can open in order to get my door to open another 4 inches or so. openings in houses are never totally square so I did add a piece of foam weather strip on each side of my insert in order to get a tight fit, which works perfect. Also, the top of the insert panel is spring loaded to adjust the height, and there are screws to be able to lock it at the exact height needed, but I left them out to be able to easily remove the insert if needed. One thing I did not like was the new mechanism to lock the sliding glass door since your latch will no longer work as this requires the user to drill into the sliding glass door frame to insert a locking pin. we have opted to go with a 2x4 for now that's been cut to keep the door closed. In all this is a great product and does what I ordered it to do. I'm not using it 100% as intended from the manufacturer but I am more than happy with the purchase. I have not noticed any real temperature change in the sun room having this installed. we were using a screen door dog insert before this and will probably remove the glass panel once again in the spring and summer.

My interaction with Petco is getting worse by the day. The doggie door wasn’t straight. I’ve called you to get a new door. When I was talking to you, my voice suddenly disappeared. I could hear her but she couldn’t hear me. I’m not pleased. if this continues I will not use Petco anymore.

This door is easy to install and my pup loves it. I installed two of them.