---
product_id: 89524091
title: "PetSafe Staywell, 799 Series Tunnel Extension, 5.8 mm, Easy, Precise Install, Grey, 4 Count (Pack of 1)"
brand: "staywell"
price: "8 zł"
currency: PLN
in_stock: false
reviews_count: 13
url: https://www.desertcart.pl/products/89524091-petsafe-staywell-799-series-tunnel-extension-5-8-mm-easy
store_origin: PL
region: Poland
---

# Trim-to-fit precision Tool-free clip system Supports thicker doors +50.8mm PetSafe Staywell, 799 Series Tunnel Extension, 5.8 mm, Easy, Precise Install, Grey, 4 Count (Pack of 1)

**Brand:** staywell
**Price:** 8 zł
**Availability:** ❌ Out of Stock

## Summary

> 🚪 Upgrade your pet’s freedom with precision and ease!

## Quick Answers

- **What is this?** PetSafe Staywell, 799 Series Tunnel Extension, 5.8 mm, Easy, Precise Install, Grey, 4 Count (Pack of 1) by staywell
- **How much does it cost?** 8 zł with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/89524091-petsafe-staywell-799-series-tunnel-extension-5-8-mm-easy)

## Best For

- staywell enthusiasts

## Why This Product

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

## Key Features

- • **Snap & Secure:** Innovative clip system ensures a firm hold—no glue or screws needed.
- • **Expand Your Options:** Adds 50.8 mm to accommodate thicker doors and walls effortlessly.
- • **Custom Fit, Every Time:** Easily trim tunnel extensions for a perfect door or wall fit.
- • **Universal Compatibility:** Works seamlessly with all 700 Series Small Pet Doors for versatile use.
- • **Weather-Resistant Durability:** Built to withstand daily use and all weather conditions.

## Overview

The PetSafe Staywell 799 Series Tunnel Extension is a versatile, easy-to-install accessory designed to extend pet door tunnels by 50.8 mm, allowing installation in thicker doors and walls. Featuring a clip system for secure assembly without tools, it’s compatible with all 700 Series Small Pet Doors and built to endure daily use and weather exposure.

## Description

Full description not available

## Features

- PRECISE FITTING - The Staywell 799 Series tunnel extensions can be trimmed for an exact fit into your door or wall.
- THICKER DOORS – The Tunnel Extension adds 50.8 mm allowing them to be installed into thicker doors and walls
- EASY INSTALL – Simply trim the 4 pieces to the depth of your door and connect the pieces together
- CLIP SYSTEM - Each piece of the Tunnel Extension Easily clasps together for a firm and secure hold that doesn’t require any glue or additional screws
- COMPATABILITY - The Staywell Tunnel Extension is compatible with all 700 Series Small Pet Doors

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Pet Type | Cat^Dog |
| Product Dimensions | 2 x 20 x 7 cm; 68 g |
| Item model number | 799GREY |
| Closure | Clip |
| Colour | Grey |
| Size | 4 Count (Pack of 1) |
| Maximum Weight Recommendation | 7 Kilograms |
| Number of Items | 1 |
| Quantity | 1 |
| Special features | Weather-proof^Easy to Use |
| Specific Uses | Daily Use^Suitable for Adult pets^Suitable for Young pets |
| Batteries required | No |
| Batteries Included | No |
| Item Weight | 68 g |

## Product Details

- **Size:** 4 Count (Pack of 1)
- **Brand:** Staywell
- **Colour:** Grey
- **Global Trade Identification Number:** 05011569005981

## Images

![PetSafe Staywell, 799 Series Tunnel Extension, 5.8 mm, Easy, Precise Install, Grey, 4 Count (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/61aueqWV1gL.jpg)
![PetSafe Staywell, 799 Series Tunnel Extension, 5.8 mm, Easy, Precise Install, Grey, 4 Count (Pack of 1) - Image 2](https://m.media-amazon.com/images/I/81CQNi6Y4PL.jpg)
![PetSafe Staywell, 799 Series Tunnel Extension, 5.8 mm, Easy, Precise Install, Grey, 4 Count (Pack of 1) - Image 3](https://m.media-amazon.com/images/I/41AjFPtm3CL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Perfect tunnel extension for cap flap
  

*by A***_ on Reviewed in the United Kingdom on 28 June 2024*

So easy to install, good quality. Sizes on the spec were spot on so fitted like a glove. Tidy appearance. Would definitely recommend as looks so much tidier than a brick or would surround. Easy to wipe and keep clean when pet comes in wet.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Needed for the flap I ordered.
  

*by D***N on Reviewed in the United Kingdom on 6 March 2022*

Only flap available in brown, so needed these to go through 9" wood wall .Flimsy at this length at 1st but now stabilised with a wooden tunnel and insulation boards.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Easy to fit. (with a long step by instructions)
  

*by M***. on Reviewed in the United Kingdom on 13 October 2020*

1. Measure the thickness of the door you wish to place the catflap into.2. Cut tunnel pieces along the grooves with kitchen scissors to the thickness of the door (Carefully).3. Assemble the tunnel frame (lining it up with the lugs on the tunnel and holes on frame) and attach it to the outer part of the catflap (you can use glue but it's not essential). 4. Mark in pencil the outside shape of the tunnel frame on the outside of the door ( make sure that the outer frame is high enough to clear the frame on the door).5. Cut a hole in the door and slide tunnel into the hole. Mark holes for screws (on the outside of the door) and drill the hole marks.6. Place inner part of the catflap, (so slit for flap locking barrier is at the top) on the inner side of the door. Slide bolts into holes until they protrude through the outer catflap holes (depending on the thickness of door you may need to buy longer bolts) and place nuts onto bolts (nuts go on the outer frame between the raised lines).7. Do the nut and bolt finger tight and line up the inner frame so that it's lip sits within the tunnel sides then tighten screws and line nut up with the two raised lines either side of the nut on the outer frame ( this will stop nut turning when tightening screw).8. If necessary, cut the screw thread so the outer flap can close ( WARNING if you use a Dremel type cutting wheel the grinding will make the screw and nut hot enough to melt the plastic so do a little off of each screw at a time). 9. Stand back and admire your work ( push flap in and out to make sure of free movement) and you're done.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pl/products/89524091-petsafe-staywell-799-series-tunnel-extension-5-8-mm-easy](https://www.desertcart.pl/products/89524091-petsafe-staywell-799-series-tunnel-extension-5-8-mm-easy)

---

*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-02-05*