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The Lessmon Thin Cat Door is a medium-sized, weatherproof pet flap designed for ultra-thin doors and windows. Featuring a robust ABS plastic frame, a magnetic sealing flap, and a versatile 4-way lock system, it offers customizable pet access while preventing unwanted intrusions. Its tunnel-free, slim profile fits doors as thin as 0.78 inches, making it ideal for sliding glass doors and wooden panels. Easy to install with included templates and hardware, this cat door balances convenience, security, and energy efficiency for modern pet owners.






| ASIN | B0C818453F |
| Best Sellers Rank | #60,689 in Pet Supplies ( See Top 100 in Pet Supplies ) #94 in Cat Flaps |
| Brand Name | Lessmon |
| Closure Type | Magnetic |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,138) |
| Dog Breed Size | Small |
| Frame Material | Plastic |
| Manufacturer | Lessmon |
| Manufacturer Part Number | Lessmon Screen Cat Door |
| Material Type | Plastic |
| Maximum Compatible Thickness | 0.78 Inches |
| Minimum Compatible Thickness | 0.1 Inches |
| Model Number | Medium |
| Pet Type | Cat |
| Size | 7.7x7.5x0.78in |
| Target Audience | Cats; Dogs (Small, Medium) |
| Unit Count | 1 Count |
K**R
This product works well on my shed which has plywood sheeting allowing our cat access to get out of the weather since he is mostly an outdoor cat. It installed easily although the instructions and template weren't overly helpful. The door functions well.
R**A
Works great, especially for the price! I got this for $9.99, as a solution for my cat who likes to go down into our unfinished basement to explore. I don't like having to keep the door to the basement open all the time because it lets cold air in, etc. With this solution, I can keep the main door closed, but my cat can come and go freely. I am grateful to the other reviewer who mentioned the magnet issue. Mine came with two little magnets, but they were not secured, so they popped out all the time. Thanks to that reviewer, I knew to be alert to this, and I determined that the cat door has two little compartments for the magnets: one on the bottom of the door flap, and one in the frame. You need one magnet in each, oriented so they attract toward each other, so that the door will flap down and stay centered in the frame between uses. However, you need to secure the magnets in their compartments, as otherwise they are strong enough that they will pull each other out. I ended up using super glue to secure them into their compartments (again confirming the correct orientation first!) and it works great now. Interestingly, the back of this door frame has no function. It attaches with its own separate screws, and has no role in the door function. I guess they figure it just looks better than having a sawed hole in the door on that side. But fyi, even if your door is thicker than the suggested door width, the door will still work, because all of the function is contained in the front panel. Interestingly, my door was within the suggested width (it's 5/8" wide -- see photo showing door width), yet there is a gap between the front frame and back frame where you can see the sawed hole of the door. Not a big deal at all. It's because there's no tunnel on this door-- just the front panel and back panel. I definitely recommend for the price point!
P**L
Well made, easy install and looks good. Keep in mind this is designed to be installed through thin material such as a plexiglass panel. Screws seemed to be of poor quality so I used my own.
A**A
I had an issue with mine where I couldn’t put it to a specific setting because the glue was blocking it from switching to that side, but after grabbing a knife and tripping the glue away, it works perfectly. It was easy to install, and it is weatherproof if you do it well. It’s the perfect size for an average size cat and it looks great when installed on my window.
J**D
Was the perfect size for normal cats. Comes with templet to cut out the right size hole. Cats didn't take long to figure out how to use it. We installed it into the window and it looks good.
Trustpilot
1 week ago
1 month ago