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A cat flap made of UPVC allows your cats to come and leave at their own pace. The installation is a three-step process that can be done on glass doors, wooden doors panels or UPVC panels. This is an excellent option for those who wish to ensure their pets are secure and save money on energy. UPVC panels are strong and are resistant to heat, moisture and UV. Easy to install If you have a cat, you might want to think about installing a pet flap in your door or glass panel. This is a great way to ensure your pet's security while you're away