https://clinfowiki.win/wiki/Po....st:Using_a_Cat_Flap_
A cat flap made of UPVC allows your cats to leave and come whenever they want to. It is a straightforward 3-step installation procedure that can be incorporated into glass doors, wooden doors, or UPVC panels. This is an excellent option for those who wish to keep their pets secure and save on energy costs. UPVC panels are tough and are resistant to heat, UV and moisture. Easy to install Installing a pet flap over your glass door or window is an excellent idea if have a cat. This is a great solution to ensure your pet's s