Wall Entry Pet Door Extension Tunnel

Designed to be compatible with the Wall Entry Aluminum Pet Door. Install your door in a wall more than 7¼ thick with this additional tunnel extension. The tunnel overlaps the pet door frame by 1 inch and fits walls 8¼ – 12 inches thick for the medium and large tunnel or 8¼ – 10¾ inches for the small tunnel. You can also cut the tunnel shorter if you need to install it in walls 7¼ – 8¼ thick. PetSafe® brand is here to help you and your pet live happy together™. Features Compatible with the Wall Entry Aluminum Pet Door new model (PPA11-10915, PPA11-10916, PPA11-10917) Extends Wall Entry Doors From 7 1/4" To 12" Thick Tunnel Can Be Cut Shorter To Accommodate Walls 7 1/4" To 8 1/4" Thick