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This double-flap insulated cat flap provides excellent protection in all climates. It can be installed in wood, uPVC, glass, and steel doors. It is essential to have a door that is sealed well, especially in cold weather. It keeps warm air from being sucked out and cold air from getting in, saving money on energy costs. Wind Resistance By preventing cold air entering your home and allowing warm air in the cat flap, it keeps it warm. Most of the best options are insulated and come with a magnetic seal to s