Sure Petcare Microchip Cat Flap Tunnel Extender, Compatible with SureFlap Cat Flap, DualScan Microchip Cat Flap & Cat Flap Connect, White

There is no situation where you will need just one of these. We needed FIVE. We don't have thick walls. Our home is standard brick two-leaf construction, as with nearly all UK houses. If you have something like an old stone cottage when you could be hitting the double digits. Wowzers!Additionally, there's no way of securing these together, or even to the catflap itself. They just losely clip onto each other, and can be pulled apart trivially. Sureflap's official YouTube video tells you to use gaffer tape to secure them! Over years the stickiness of the tape will break down so you'll need to periodically remove the entire thing, and re-gaffer-tape it.It's all a bit of a mess. Sureflap needs to do better here.

If you thought an extender would be as thick as the door mount (~4mm thickness) you'd be dead wrong: this is 1mm thin plastic that will break the moment you try to mount it. You can clearly see the thickness difference when you mount it - I guess plastic is expensive these days right?As others have said, the mounting is flimsy also - best glue it - yes I am not joking - and then use strong tape on the outside. Otherwise it will break in time.You will need lots, for a normal wall at least 4 if not 5-6 making the tunnel the cost of the original flap! The usual nickel and dime for accessories. Thankfully Amazon charges just a fiver, others charge 2x or more!To be honest it make be cheaper, sturdier to get a plastic merchant build you tunnel from 4-5mm perspex/HDPE or (bend it round to make the tunnel - yes they can do this). I am getting quotes and will send all 4 of them back to AZ if it works out.

Bought this product to go through 11" cavity wall. Works very well at reading my cats chip. Took a while for him to get used to using it and it's quite a long tunnel. A hint when assembling the tunnel to prevent it coming apart all the time is the use of a little solvent cement ( plumbing waste pipe glue) made the whole job of installation so much easier.

Expensive for what it is. Annoying that you can (at the time of writing) only buy a minimum of 4. I bought 4 and then found I needed 2 more. Had to get them elsewhere.Seem to work OK, though it’s still early days.The plastic is not grippy, which means that when the cat wants to come back in, they likely need to be able to get their back feet on the ground for leverage to push the flap open. Our tunnel is quite long (6 sections) plus a bit higher off the ground than is ideal, so our cat had this problem. We ended up putting a piece of non-slip bathtub mat on the tunnel floor. That fixed it.

my partner purchased this extension for the cat flap thinking that it would be long enough to go through the wall, but kn reality, it is only 50mm long, why don't you make 1 unit that comes as a cuttable length, rather than selling sections at 50mm long, I know, it's called profiteering.....