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- PetSafe Telescoping Aluminum Wall Entry Pet Door by PetSafe
Easy to install, do-it-yourself pet door for your wall. Telescoping tunnel to accommodate both 2 x 4" and 2" x 6" construction. Double flap construction with adjustable sill and extra strong magnets ensures excellent insulation factor. Includes a non-rusting locking closing panel. For dogs and cats 40 lbs and under."