PetSafe Wall Entry Aluminum Pet Door Extension Tunnel - Compatible with PetSafe Wall Entry Pet Door - Large

So simple

Need it with dog flap to finish job off

Not easy to fit

Still a bit small for UK walls but we made it work

Far too expensive for what it is, no fixings so relying on pet flap to secure it.

Worked great for our block wall and our dogs love the door!

Doesn’t even fit a medium Petsafe dog door even though it’s a medium and petsafe product…

This works great for installing the pet safe pet door through a wall rather than a door.

Product as described fast shipping good price easy to install with Pet safe dog door

Pros: It filled in the gap between the inside and outside door sections. Cons: 1. It is metal and not insulative at all so there's no energy efficiency. 2. It's made with holes on the bend edges and where it seams together so it's not waterproof at all. 3. When folded into a rectangle it's so much bigger than the door section it goes over that the gap is quite hard to tape shut. It would be much better if in the as-folded-up rectangular shape it could fit much closer to the rectangular plastic it's supposed to fit over. After all the plastic rectangle is molded and dimensionally accurate to probably =/- .008" and this folded metal extention could easily be scored [instead of having holes punched into it] to bend to those tolerances and fit the plastic. Getting the dimensions correct is what engineers are for, so make them do their job.