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PetSafe Extreme Weather Sliding Glass Dog Cat Door Replacement Medium; If youre noticing unwelcome drafts inside your normally comfortable home it may be time to replace the flaps on your fur-babys pet door. PetSafes Extreme Weather Sliding Glass Dog Cat Door Replacement Flaps are designed to maintain the temperature in your home how you like itkeeping cold air out in winter and air conditioning inside during hot summer months. An insulated flap is surrounded by two vinyl flapson each sideso rain and drafts stay outside where they belong. Plus magnets at the bottom of the flaps help ensure your pet door stays closed when not in use. Designed to fit your current PetSafe Extreme Weather Sliding Glass Pet Door sold separately with a quick and easy 3 step installation.