Why it matters
Installing a SureFlap Microchip Cat Flap in a wall needs tunnel extenders to bridge the wall's thickness. This one fits the cat flap, not the larger pet door.
Stack extenders for thicker walls.
Who it's for, and who should skip it
Good fit if
- SureFlap owners
- Wall installs
- Thick doors
Look elsewhere if
- SureFlap pet door owners
- Glass installs
- Other brands
Pros and cons
Pros
- Official fit
- Stackable
- Low price
Cons
- Cat flap only
- Several may be needed
- White only
Limitations to weigh
- Measure wall thickness first.
- Stack extenders as needed.
- Seal edges against drafts.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Frame material | Plastic | Retailer |
|---|---|---|
| Closure | Flap | Retailer |
| In the pack | 1 Count | Retailer |
| Pieces | 1 | Retailer |
| Product weight | 2.4 ounces | Retailer |
| Model number | Tunnel Extender - White | Retailer |
| Dimensions (seller) | 6.5 x 3 x 6.5 inches; 2.4 ounces | Retailer |
Alternatives worth comparing
More cat flaps & doors we cover
- ikuso Interior Cat Door
- Wordcam X-Large Interior Cat Door
- The Kitty Pass Interior Cat Door
- Purrfect Portal Meow Manor Interior Cat Door
All cat flaps & doors, compared in one table · Every SureFlap product we cover
Final verdict
The extender that makes a wall install work.
Where to buy
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Questions buyers ask
Which flap does it fit?
The SureFlap Microchip Cat Flap, not the pet door.
Is it for walls?
Yes.