https://articlescad.com/replac....ement-upvc-door-pane
A upvc panel cat flap allows your cats to go and go at their own pace. It's a simple three-step installation process and can be incorporated into wooden doors, glass doors or UPVC panels. It is an excellent choice for those who want to ensure their pets' safety and reduce energy costs. UPVC panels are strong and are resistant to heat, UV and moisture. Easy to install Installing a pet flap onto your glass door or window is an excellent idea if you have a cat. This is a great solution to ensure your pet's safe