https://articlescad.com/cat-fl....aps-for-french-doors
https://output.jsbin.com/kihiyihusa/
https://self-hassing-3.technet....bloggers.de/cat-flap
A cat flap for a door made of UPVC is a great way to allow your cats to move around as they please. The installation is a 3-step procedure that can be completed on glass doors, wooden doors panels or UPVC panels. This is a great choice for pet owners who want to keep their pets secure and save on energy costs. UPVC panels are resistant to heat, moisture and UV. Easy to install If