https://theflatearth.win/wiki/....Post:UPVC_Door_Panel
uPVC is a popular option for home doors. They are durable and easy to maintain. They can be difficult to put in with an enclosure for cats. A replacement upvc panel with a cat flap is often the best choice. It is easy to put in and is much less expensive than a new door. Safety uPVC door panels that have cat flaps are a great option to let your pet go inside and out of your home without having to open the door. These door panels are available in a variety of designs and can be adapted to fit any door frame. They ar