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Cat and dog flaps in double glazing makes it simple for your pets to go and come whenever they want. These are also great to keep your pet's attention while you are away. It is possible to fit the cat flap onto an existing uPVC panel or double glazing glass sealed unit, but you'll need a replacement piece with a hole that is pre-made. A glazier is able to do this with the proper equipment and training. Easy to install Having a cat flap in