---
product_id: 550605672
title: "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, Outer Size 7.76 * 7.5 * 0.78in)"
brand: "lessmon"
price: "AR$51389"
currency: ARS
in_stock: true
reviews_count: 8
category: "Lessmon"
url: https://www.desertcart.com.ar/products/550605672-thin-cat-door-for-windows-pet-doors-and-sliding-door
store_origin: AR
region: Argentina
---

# 4-way lock modes for ultimate control Easy DIY install with included template & screws Ultra-thin 0.78in design fits windows & sliding doors 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, Outer Size 7.76 * 7.5 * 0.78in)

**Brand:** lessmon
**Price:** AR$51389
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 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, Outer Size 7.76 * 7.5 * 0.78in) by lessmon
- **How much does it cost?** AR$51389 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/550605672-thin-cat-door-for-windows-pet-doors-and-sliding-door)

## 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

- • **Built to Last:** Durable ABS plastic withstands daily pet traffic without wear or warping.
- • **Sleek & Slim Fit:** Only 0.78 inches thick, perfect for thin doors, windows, and sliding glass panels.
- • **Hassle-Free Setup:** Comes with detailed template, screws, and double-sided tape for quick, no-fuss installation.
- • **Freedom on Your Terms:** 4-way lock lets you customize pet access—free roam or secure lockdown.
- • **Weatherproof & Energy Smart:** Sealed flap with magnets keeps bugs out and reduces heat/cold loss year-round.

## Overview

The Lessmon Thin Cat Door is a medium-sized, weatherproof pet flap designed for thin doors and windows up to 0.78 inches thick. Featuring a 4-way locking system, magnetic sealing, and durable ABS plastic construction, it offers customizable pet access while preventing drafts and pests. Easy to install with included templates and hardware, it’s ideal for cats and small dogs seeking independent indoor-outdoor freedom.

## Description

desertcart.com : 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, Outer Size 7.76 * 7.5 * 0.78in) : Pet Supplies

Review: Nice cat door - 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! - 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 | #8,669 in Pet Supplies ( See Top 100 in Pet Supplies ) #16 in Cat Doors |
| Brand | Lessmon |
| Brand Name | Lessmon |
| Closure Type | Magnetic |
| Color | White |
| Customer Reviews | 4.4 out of 5 stars 2,148 Reviews |
| Dog Breed Size | Extra Small, Medium, Small |
| Frame Material | Acrylonitrile Butadiene Styrene (ABS) |
| Manufacturer | Lessmon |
| Manufacturer Part Number | Lessmon Screen Cat Door |
| Material | Plastic |
| Material Type | Plastic |
| Mattress Thickness | 0.78 Inches |
| Maximum Compatible Thickness | 0.78 Inches |
| Minimum Compatible Thickness | 0.1 Inches |
| Minimum compatible thickness | 0.1 Inches |
| Model Number | Medium |
| Pet Type | Cat, Dog, Small Animal |
| Size | 7.76x7.5x0.78in |
| Target Audience | Cats; Dogs (Small, Medium) |
| Unit Count | 1.0 Count |

## Product Details

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

## Images

![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, Outer Size 7.76 * 7.5 * 0.78in) - Image 1](https://m.media-amazon.com/images/I/61jjiTUAT2L.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

### ⭐⭐⭐⭐⭐ Nice cat door
*by K***R on January 26, 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.

### ⭐⭐⭐⭐⭐ Works great, especially for the price!
*by R***A on March 27, 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!

### ⭐⭐⭐⭐ Well made and reasonably priced
*by P***L on March 4, 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 Argentina*
*Store origin: AR*
*Last updated: 2026-05-22*