https://yamcode.com/upvc-door-....panel-replacement-ca
A cat flap made of UPVC is a great way to let your cat come and go as they please. It is a simple 3-step installation procedure that can be incorporated into wooden doors, glass doors, or UPVC panels. This is a great choice for those who wish to keep their pets secure and reduce energy costs. UPVC panels are tough and can resist moisture, heat and UV. Easy to install Installing a pet flap on your glass door or glass panel is an excellent idea if you have a cat. This is a great solution to keep your pet secure when you're away