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https://yamcode.com/using-upvc....-cat-flap-door-panel
A upvc panel cat flap allows your cats to go and go at their own pace. It's a simple three-step installation procedure that can be fitted into wooden doors, glass doors, or UPVC panels. This is an excellent option for those who wish to keep their pets secure and reduce energy costs. UPVC panels are strong and are resistant to heat, UV and moisture. Easy to install If you have a cat you might want to think about installing a pet flap inside your glass door or window. This is a great solution to keep your