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If you have a pet or a cat, installing a pet flap on your French or patio doors is a great idea. It makes it easy for them to go into and out without having to open the door. There are several cat flaps available made to fit into uPVC or composite doors, as well as wooden doors. Some even have a four-way locking system that can be set to leave only by entering only the open position, or both. Installation Cat flaps are a great method to let your cat in and out of your home without havin