Through-wall install: Permanent mount for exterior walls, with a tunnel that bridges studs and exterior siding Wall thickness 4.5" to 7.5": Measure your wall before ordering, since thickness is the most common return reason Five sizes, two colors: Small, medium, large, XL, and XXL, available in white or black aluminum framing Single or double flap: Double flap adds an insulating air gap for colder climates, single flap is lighter for smaller pets Made in USA, locking cover included: Built domestically and backed by a 3-year warranty against defects The Liberty Pet Door for Walls is a permanent through-wall pet door for dogs, built for owners who want a door their pet can use without changing an existing entry door. It comes with everything needed to install through standard residential framing.The aluminum frame and clear vinyl flap are rated from 0°F to 115°F. The magnetic seal plus perimeter weatherstripping keep drafts out in winter and conditioned air in during summer. A locking cover ships with every unit. Five sizes (small, medium, large, XL, XXL) and two colors (white, black) cover most pet and home combinations.Before ordering, measure the thickness of the wall where you plan to install. The tunnel fits walls 4.5" to 7.5" thick. If your wall falls outside that range or you need a non-standard flap size, use the custom-dimension version instead. Pick size by your largest pet's shoulder width and chest height, not by current weight, and choose double flap if you live somewhere with cold winters.Made in the USA and backed by a 3-year warranty on materials and workmanship. Install is a moderate DIY job that usually involves cutting an opening between studs.
