Best basic(ish) cat flap?

[Adollop]

I'm looking for a cat flap, nothing fancy with magnets and chips, just basic with locking in and out. What is the sturdiest/best one? I have three cats, one quite a chunky boy, 5 kg.

Thanks.

Bump

https://www.amazon.co.uk/dp/B003EGIM3O/ref=cmswwrcppapiii_.upNDbS2VQJP2

We've got this one. Really easy to install, and it's microchip operated so no random cats sneaking into the house. Took only 5 minutes to teach the cats to use it with the help of dreamies.

Only issue is you need to clean it regularly as when it's dirty or full of fur around the edges it makes the microchip reader a bit temperamental.

Oops just realised you said no chips