--- product_id: 49052896 title: "Cat Flap Wall Liner Accessory (303) - 50 mm (2\") Wall Liner/Tunnel Section for use with Models 234 and 235 Only (Pack of 1)" brand: "cat mate" price: "¥6901" currency: JPY in_stock: true reviews_count: 13 category: "Cat Mate" url: https://www.desertcart.jp/products/49052896-cat-flap-wall-liner-accessory-303-50-mm-2-wall store_origin: JP region: Japan --- # paintable surface for seamless decor match modular design for custom wall thickness 50mm tunnel extension for thick walls Cat Flap Wall Liner Accessory (303) - 50 mm (2") Wall Liner/Tunnel Section for use with Models 234 and 235 Only (Pack of 1) **Brand:** cat mate **Price:** ¥6901 **Availability:** ✅ In Stock ## Summary > 🚪 Upgrade your cat’s freedom with a sleek, custom-fit tunnel extension! ## Quick Answers - **What is this?** Cat Flap Wall Liner Accessory (303) - 50 mm (2") Wall Liner/Tunnel Section for use with Models 234 and 235 Only (Pack of 1) by cat mate - **How much does it cost?** ¥6901 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/49052896-cat-flap-wall-liner-accessory-303-50-mm-2-wall) ## Best For - cat mate enthusiasts ## Why This Product - Trusted cat mate brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Customizable Length:** Cut and connect multiple liners to tailor the tunnel length exactly to your home’s needs. - • **Sleek, Paintable Finish:** Blend the liner effortlessly with your interior style using its smooth, paint-ready surface. - • **Hassle-Free Installation:** Clear instructions and lightweight design make upgrading your cat flap a breeze. - • **Moisture-Resistant & Stable:** Add sealant and duct tape between liners for a durable, weatherproof tunnel your cat will love. - • **Perfect Fit for Thick Walls:** Seamlessly extends your Cat Mate 234/235 flap tunnel by 50mm to conquer any wall thickness. ## Overview The Cat Mate Cat Flap Wall Liner Accessory (303) is a 50mm plastic tunnel extension designed exclusively for Cat Mate models 234 and 235. It enables installation through thicker walls by modularly extending the tunnel length, is paintable to match home decor, and supports moisture resistance when sealed properly. Lightweight and easy to install, it comes with a 3-year warranty, ensuring a durable and stylish upgrade for your pet’s access. ## Description Free delivery and returns on eligible orders. Buy Cat Mate Cat Flap Wall Liner Accessory (303) - 50 mm (2") Wall Liner/Tunnel Section for use with Models 234 and 235 Only (Pack of 1) at desertcart UK. Review: Perfect fit, Just the Job - Fast delivery (arrived before the cat flap from another source). Fitted easily and perfectly. Just big enough along with the cat flap to fit in a single brick wall. Very pleased with the result. I do wish however, I could have got this in brown to match the cat flap. Review: £7.95 and £4 minimum to send back-!!-as wasn't required after all. - Great item-but we found it was not required after all-so selling on a well-known auction site as this would cost over half what I paid to send it back with desertcart-which is rubbish-!! **Be warned** tho'-no way could you cut this (or the matching cat flap) with a Stanley knife as shown on instructions-!!-it is way too thick-and you could severely injure yourself-!!-we ended up using a hacksaw/saw blade-and it was tough enough-!! ## Features - COMPATIBLE WITH CAT FLAPS: Suitable for Cat Mate models 234 and 235 only, ensuring seamless integration for easy installation in thicker walls. Each liner measures 50 mm / 5 cm / 2" long - EXTENDS TUNNEL LENGTH: Adds 50 mm (2") to the tunnel length, ideal for thicker walls. For a 20 cm tunnel, you’d need 4 liners. Liners can be cut down for custom lengths, such as 5 liners cut for a 22 cm tunnel - PAINTABLE SURFACE: Features a paintable surface to blend with any decor, offering a polished finish for home installation - MODULAR DESIGN: Connect multiple sections to suit varying wall thicknesses. Adding sealant between liners creates a moisture-resistant tunnel, while duct tape ensures stability - EASY INSTALLATION: Includes clear instructions for hassle-free installation, making the tunnel solid and easier to handle ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001A3PZ2O | | Best Sellers Rank | 31,540 in Pet Supplies ( See Top 100 in Pet Supplies ) 75 in Cat Flaps | | Brand Name | Cat Mate | | Closure Type | Flap,Lockable | | Colour | White | | Country Of Origin | China | | Customer Reviews | 4.3 4.3 out of 5 stars (932) | | Dog Breed Size | All | | Frame Material | Plastic | | Global Trade Identification Number | 00035368003035 | | Included Components | Wall Liner | | Item Type Name | Cat Flap Wall Liner | | Item Weight | 0.14 Kilograms | | Manufacturer | Pet Mate | | Manufacturer Part Number | 303 | | Manufacturer Warranty Description | 3 year warranty. | | Material Type | Plastic" // or "Resin | | Maximum Compatible Thickness | 2 Inches | | Minimum Compatible Thickness | 1.8 Centimeters | | Model Number | 303 | | Size | One Size | | Target Audience | Cats | | UPC | 035368003035 740023634775 | | Unit Count | 1 Count | ## Product Details - **Brand:** Cat Mate - **Colour:** White - **Material:** Plastic" // or "Resin - **Mattress thickness:** 2 Inches - **Size:** One Size ## Images ![Cat Flap Wall Liner Accessory (303) - 50 mm (2") Wall Liner/Tunnel Section for use with Models 234 and 235 Only (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/41-H6LAtZVL.jpg) ## Questions & Answers **Q: Can this be cut down to fit a door 58mm thick?** A: Yes you can cut the loner as shallow as you need...I used a Dremel or you could use a fine saw. Would have thought if just a door to go through no liner would be necessary. **Q: Is this compatible with the 221w?** A: Pretty sure it should say on the cat flap which can fit the tunnel/wall linner. From memory there were 2 cat mate flaps it fitted but think they were higher numbers than 221w. **Q: product dimension 22.9 is larger than size of recommended cat flap 235W to go with it. What are internal and external dimensions of this cat flap?** A: I found no problems using this liner with the 235W. They are compatible. The 22.9 figure is a diagonal measurement, the real internal size is approximately 16cm wide by 16.5cm high. **Q: What is this for please?** A: This item is designed to bridge the gap between the flap section and the other part when fitting the flap through (say) a 4 inch thick stud wall. Or, also a single brick wall or similar thickness exterior door. It can be trimmed thinner if the door is not too thick, or if the two parts do not quite reach through the item you wish to install the flap and outer flange into. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect fit, Just the Job *by P***E on 16 November 2013* Fast delivery (arrived before the cat flap from another source). Fitted easily and perfectly. Just big enough along with the cat flap to fit in a single brick wall. Very pleased with the result. I do wish however, I could have got this in brown to match the cat flap. ### ⭐⭐⭐⭐ £7.95 and £4 minimum to send back-!!-as wasn't required after all. *by A***D on 2 January 2021* Great item-but we found it was not required after all-so selling on a well-known auction site as this would cost over half what I paid to send it back with Amazon-which is rubbish-!! **Be warned** tho'-no way could you cut this (or the matching cat flap) with a Stanley knife as shown on instructions-!!-it is way too thick-and you could severely injure yourself-!!-we ended up using a hacksaw/saw blade-and it was tough enough-!! ### ⭐⭐⭐⭐⭐ Expensive but do the job - I had to buy 4! *by S***Y on 14 May 2020* I bought this together with the catflap. It was difficult to calculate how many tunnel pieces I need as this was going in a 9” solid wall. I bough 4 tunnels which clip together, these ended up costing more than the catflap itself. The tunnels are expensive for what they are but do the job nicely and being plastic can easily be cleaned. ## Frequently Bought Together - Cat Mate 2" Wall Liner - Cat Mate 4-Way-Locking Cat Flap with Door Liner to 50mm (2 inches), Easy Installation in UPVC Doors, Walls, and Wooden Doors - White - Cat Mate Lockable Cat Flap with Door Liner, White --- ## 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.jp/products/49052896-cat-flap-wall-liner-accessory-303-50-mm-2-wall](https://www.desertcart.jp/products/49052896-cat-flap-wall-liner-accessory-303-50-mm-2-wall) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-24*