---
product_id: 576565198
title: "Lessmon Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 6.7in x 6.3in Flap)"
brand: "lessmon"
price: "179.20 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Lessmon"
url: https://www.desertcart.tn/products/576565198-lessmon-thin-cat-door-for-windows-pet-doors-and-sliding
store_origin: TN
region: Tunisia
---

# 4-way lock modes easy DIY install kit fits ultra-thin doors/windows Lessmon Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 6.7in x 6.3in Flap)

**Brand:** lessmon
**Price:** 179.20 DT
**Availability:** ✅ In Stock

## Summary

> 🐾 Unlock your pet’s freedom with style and control!

## Quick Answers

- **What is this?** Lessmon Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 6.7in x 6.3in Flap) by lessmon
- **How much does it cost?** 179.20 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/576565198-lessmon-thin-cat-door-for-windows-pet-doors-and-sliding)

## Best For

- lessmon enthusiasts

## Why This Product

- Trusted lessmon brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hassle-Free Installation:** Comes with templates, screws, and double-sided tape for a quick, professional setup—no contractor needed.
- • **Sleek, Ultra-Thin Design:** Only 0.78in thick—perfect for sliding doors, windows, and thin walls without bulky tunnels or modifications.
- • **Total Control Over Pet Access:** 4-way lock system lets you customize in/out permissions to keep your pet safe and stray animals out.
- • **Built to Last with Premium ABS:** Durable plastic frame resists wear and tear, ensuring long-term pet freedom without compromising style.
- • **Weatherproof & Energy Efficient:** Sealed with magnetic flap and brush strips to block bugs, odors, and reduce heat/cold loss year-round.

## Overview

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.

## Description

Lessmon high quality 0.78in thick cat door provides your furry friends easy in and out access, helps them be at ease. It seems to tell them: “Be My Guest!” Safer with 4 Way Lock There are 4 simple icons on the cat door for windows, convenient for you to adjust the mode to Fully Locked or Out Only, In Only, or Free in & Out. Medium Size and Wide USE The outer size is 7.7x7.5x0.78in(19.7x19x2cm), inner size is 8.3x7.7in(17x16cm). Perfect for cats or other small pets with waist circumstance shorter than 19.8in. Without tunnel part, the pet doors for cats are suitable for windows, wooden door and sliding glass door, etc. Also, it can be installed in interior exterior thin doors, cat house or litter box and more; compatible with abundant materials. Sturdy, Weather-resistant -Strong ABS plastic frame tends to work well for long time; smooth surface avoid potential hurts towards the pets. -Brush strip and magnets for aligning, to ensure the window cat door has good sealing performance when it’s closed, without undue noise when it’s open. Simple Installation 1.Cut the corresponding model template from the instruction manual 2.Use at least two pieces of double-sided adhesive to stick the template to the window or door, and draw the outline of the template (or cut directly along the edge of the template without drawing the outline) 3.Cut the wooden board along the edge 4.Install the cat door, tighten the screws and add the caps Tips: 1.Determine whether to drill holes for screws according to the material of the mounting surface. 2.Depending on the thickness of the mounting surface, decide whether to put on the rear panel.

Review: 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.
Review: 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!

## Features

- Freedom & Convenience - Through the great cat door, your cats or small dogs can go in and out easily and quietly. They won’t feel trapped and you no longer bother to open or close the door for them.
- Safer with 4 Lock Modes - By slide the switches, you can adjust the access mode to Free In & Out, Fully Locked, Out Only, In Only, control your pet’s access and keep away stray animals.
- No Tunnel Part, No Need to Cut - The panels are only 0.78in thick and tightly fitted, suitable for windows, wooden door and sliding glass door, etc. With 7.7 x 7.5in outer size, 6.7in x 6.3in flap, the cat door for window great for cats and small dogs with waist circumstance shorter than 19.8in.
- Durable & Comfortable - Made of sturdy ABS plastic, the cat door interior door is ready to serve your pets for long time. With sealing well strip, magnet for aligning, it can keep away bugs and the smell of cat litter, reduce the loss of cold air in summer and the loss of heat in winter.
- Simple Installation - Package includes detailed instructions(with templates on), 8 screws and their caps, double-sided tapes. You can cut the template off and install the cat door for sliding glass door easily.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Product Details

- **Brand:** Lessmon
- **Colour:** White
- **Material:** Plastic
- **Mattress thickness:** 0.78 Inches
- **Size:** 7.7x7.5x0.78in

## Images

![Lessmon Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 6.7in x 6.3in Flap) - Image 1](https://m.media-amazon.com/images/I/61jjiTUAT2L.jpg)
![Lessmon Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 6.7in x 6.3in Flap) - Image 2](https://m.media-amazon.com/images/I/71qcmS-V75L.jpg)
![Lessmon Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 6.7in x 6.3in Flap) - Image 3](https://m.media-amazon.com/images/I/71FDWe5BfsL.jpg)
![Lessmon Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 6.7in x 6.3in Flap) - Image 4](https://m.media-amazon.com/images/I/71vWskaMydL.jpg)
![Lessmon Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 6.7in x 6.3in Flap) - Image 5](https://m.media-amazon.com/images/I/71g42JbkuJL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does this actually work for a glass window?**
A: It does work with a glass window but you need to put a piece of plexiglass or wood above it to block the open space in the window

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by K***R on 26 January 2026*

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.

### ⭐⭐⭐⭐⭐ Review
*by R***A on 27 March 2025*

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!

### ⭐⭐⭐⭐ Review
*by P***L on 4 March 2026*

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.

## Frequently Bought Together

- Thin Cat Door for Windows, Pet Doors and Sliding Door, Safety Pet Door with 4 Way Lock, Weatherproof Cat Flap for Thin Door and Wall(Medium, 7.7 * 7.5 * 0.78in)
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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-05-08*