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The UPVC/PVCU material is eco-friendly that is impervious to fire and UV. It also has a high insulation which helps reduce heating costs. It's a great option for homes in areas with extreme weather conditions. The installation of a cat flap onto an upvc door is simple. Follow the steps that are included in the kit you buy. are highly flexible and can be inserted into a variety of different frames. They are also immune to UV radiation and fire. This makes them an excellent option for homes in harsh weather areas. They ar