PetSafe Wall Entry Extension Tunnel, Compatible with PetSafe Wall Entry Pet Door, Medium

PetSafe Wall Entry Aluminum Pet Door Extension Tunnel - Extends Wall Entry Doors for Thick Walls (7.25 in. - 12 in.) - Medium, Black

PetSafe Original Replacement Flap, Dog Door Replacement Flaps, Doggie Flaps Made of Non-Toxic Material, Weather Resistant, (Size- Medium)