High Tech Pet WA-1 Wall Adapter Tunnel for Power Pet Door PX-1High Tech Pet WA 1 Wall Adapter Tunnel for Power Pet Door PX 1 eliminates the need for framing of the hole you cut in your wall for the pet door passageway and gives your Power Pet door installation a high quality, professionally finished look when installing in a wall. Made of high strength ABS composite, it fits snugly into the back of your Power Pet door and telescopes into the doors outside frame. For wall installation of the PX 1 door Instantly