--- product_id: 49052896 title: "Cat Mate Wall Liner Tunnel Section (For 234,235 Flaps), White" brand: "cat mate" price: "S$28" currency: SGD in_stock: true reviews_count: 13 category: "Cat Mate" url: https://www.desertcart.sg/products/49052896-cat-mate-wall-liner-tunnel-section-for-234-235-flaps store_origin: SG region: Singapore --- # paintable surface 50mm tunnel extension modular clip-together design Cat Mate Wall Liner Tunnel Section (For 234,235 Flaps), White **Brand:** cat mate **Price:** S$28 **Availability:** ✅ In Stock ## Summary > 🚪 Extend your cat’s freedom in style—custom fit, sleek finish, zero compromise! ## Quick Answers - **What is this?** Cat Mate Wall Liner Tunnel Section (For 234,235 Flaps), White by cat mate - **How much does it cost?** S$28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/49052896-cat-mate-wall-liner-tunnel-section-for-234-235-flaps) ## 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 - • **Built to Last & Seal:** Add sealant for moisture resistance and duct tape for extra stability—durability meets design. - • **Perfect Fit Every Time:** Trim and combine liners to customize tunnel length for any wall thickness up to 20cm+. - • **Seamless Style Upgrade:** Paintable surface lets you blend the liner flawlessly with your home décor. - • **Effortless Installation:** Clear instructions and lightweight plastic make setup quick and hassle-free. - • **Exclusive Compatibility:** Designed specifically for Cat Mate 234 & 235 flaps—no guesswork, just perfect integration. ## Overview The Cat Mate Wall Liner Tunnel Section is a 50mm modular extension designed exclusively for Cat Mate models 234 and 235. It allows you to customize tunnel length for thicker walls, features a paintable surface for seamless décor integration, and offers easy installation with durable plastic construction. Perfect for millennial pet owners seeking a stylish, functional upgrade to their cat flap setup. ## Description From the manufacturer Introducing the Cat Mate 50mm Wall Liner! The Cat Mate Wall Liner is a versatile and paintable extension designed to simplify wall installations for your Cat Mate products. Each 50mm section can be easily added to models such as the Cat Mate Lockable Cat Flap with Wall Liner, Cat Mate 4-Way Locking Flap with Wall Liner, and Cat Mate Lockable Cat Flap. These liners can be trimmed to accommodate nearly any installation depth, allowing you to achieve a perfect fit. Customize the liner to match your décor, ensuring your cat's access is both secure and stylish. Made for Cat Mate Standard Sized Doors The Cat Mate Wall Liner is designed exclusively for use with the Cat Mate standard line of doors. The liner can be easily painted to match any installation, offering both flexibility and style. This versatile liner ensures a seamless and secure wall installation, perfectly complementing your pet door. Combine as many as needed for almost any installation The Cat Mate Wall Liner is designed for maximum versatility, allowing you to lock multiple sections together to achieve the precise installation depth you need. Each liner can be trimmed to fit nearly any wall, ensuring a perfect, customized fit. This paintable liner not only locks securely in place but also offers a seamless and stylish finish for your installation. Measure your door's flap to confirm fit To ensure a proper fit, please measure your door's flap before purchasing. The flap should measure 15cm by 15cm, and not have any electronic features to be compatible with this product. If your flap is different, you may need the Cat Mate Elite Wall Liner or the Cat Mate Large Wall Liner, depending on the specific door model you have. Does not fit any other Cat Mate / Dog Mate / Closer Pet Doors This liner is specifically designed for the Cat Mate standard size line of doors and is not compatible with other models. It cannot be used with the Cat Mate Elite and large lines of doors, any Dog Mate doors, or the Cat Mate / Closer Pets Microchip Controlled Door. Please ensure you have the correct door model before purchasing to avoid compatibility issues. Review: Useful cat flap wall liners - These extension sections were handy for building the cat door through the external wall. They're good quality plastic Review: Expensive but do the job - I had to buy 4! - 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. ## Features - Warning:Not suitable for children under 3 years. For use under adult supervision - Warning:To be used under the direct supervision of an adult - 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 | 24,732 in Pet Supplies ( See Top 100 in Pet Supplies ) 46 in Cat Flaps | | Brand | Cat Mate | | Brand Name | Cat Mate | | Closure Type | Flap,Lockable | | Colour | White | | Country Of Origin | China | | Customer Reviews | 4.3 out of 5 stars 940 Reviews | | 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 | Plastic" // or "Resin | | Material Type | Plastic" // or "Resin | | Mattress thickness | 2 Inches | | Maximum Compatible Thickness | 2 Inches | | Minimum Compatible Thickness | 1.8 Centimeters | | Minimum compatible thickness | 1.8 Centimeters | | Model Number | 303 | | Pet Type | Cat | | Size | One Size | | Smart Home Compatibility | Not Smart Home Compatible | | Target Audience | Cats | | UPC | 035368003035 740023634775 | | Unit Count | 1.0 count | ## Product Details - **Brand:** Cat Mate - **Colour:** White - **Material:** Plastic" // or "Resin - **Mattress thickness:** 2 Inches - **Size:** One Size ## Images ![Cat Mate Wall Liner Tunnel Section (For 234,235 Flaps), White - Image 1](https://m.media-amazon.com/images/I/41-H6LAtZVL.jpg) ![Cat Mate Wall Liner Tunnel Section (For 234,235 Flaps), White - Image 2](https://m.media-amazon.com/images/I/31g-LQ16CAL.jpg) ![Cat Mate Wall Liner Tunnel Section (For 234,235 Flaps), White - Image 3](https://m.media-amazon.com/images/I/31FqA0DQpEL.jpg) ![Cat Mate Wall Liner Tunnel Section (For 234,235 Flaps), White - Image 4](https://m.media-amazon.com/images/I/31ZHYkaqwZL.jpg) ![Cat Mate Wall Liner Tunnel Section (For 234,235 Flaps), White - Image 5](https://m.media-amazon.com/images/I/51QekM2qhBL.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 ### ⭐⭐⭐⭐⭐ Useful cat flap wall liners *by A***O on 5 July 2026* These extension sections were handy for building the cat door through the external wall. They're good quality plastic ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐ Fits the 304 model catflap *by V***H on 16 August 2016* It was a bit expensive for a moulded piece of plastic, but completely necessary for fitting the catflap through a door. I chanced it and got it to go with the catmate 304 model and it fits perfectly. ## 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.sg/products/49052896-cat-mate-wall-liner-tunnel-section-for-234-235-flaps](https://www.desertcart.sg/products/49052896-cat-mate-wall-liner-tunnel-section-for-234-235-flaps) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-07-21*