The Ruff Weather Wall kit is a plastic tunnel that connects the Ruff Weather doggy door and provides the necessary thickness for walls up to 7 1/4” thick. The tunnel can be trimmed down for thinner walls.
For years Ideal has had no large size, they went from medium to XL. In December 2022 they changed the sizing so that XL is now Large and Super Large is now XL. If you are an existing owner and need flaps or a new door, use the flap dimensions to avoid any confusion. Large has a flap size of 9 3/4 x 17, Extra Large is 15 x 23.