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PlexiDor Performance Pet Doors for Dogs and Cats – Door Mount Dog Door with Lock and Key – Bronze, Large Sizes

Amazon.com Price: $612.00 (as of 04/08/2023 23:26 PST- Details)

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Never buy replacement flaps again. Doors open fast and close tight. Saloon style thermopane panels keeps heating and cooling inside your home.
Accommodates dogs up to 100 pounds. Promotes exercise, good health, weight maintenance for a longer happier life.