The PetSafe SmartDoor Wall Entry Conversion Kit makes it easy to install your large PetSafe SmartDoor (PPA11-10709) into an interior or exterior wall. It consists of a two-piece molded frame with a protective outer lip. Features: 28.17" x 20.53" x 3.69". Frame is impact and UV-resistant with telescoping option. Fits walls 4.75"-7.25" thick. Includes: Outside frame and tunnel. 20 wood screws and 12 washers. Cut-out template. Installation instructions.