|  If you ve resisted installing a pet door due to the loss of insulation and security to your home a new solution is available that will last for many trouble-free years and look great in your home. Best of all the Dual-Flap Door-Mount Dog Door is beautifully engineered to be durable insulated and secure: This heavy-duty aluminum unit mounts in your existing door and can t be removed from the outside. Heavy-duty aluminum construction is rugged and stylish Ultra-secure pet door can t be removed from the outside Dual flap for extra insulation Easily installs in doors 1.25 to 2.25 inches thick Large for 60 pound dogs
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