Replacement RV air conditioner shroud fits "old style" Brisk Air 11000, 13500, and 15000 BTU air conditioners.The original Brisk Air has a 2" grey band attached along the bottom and on some the rear side is left open. The ICON replacement Brisk Air (Old Style) has the extra 2 inches molded as one piece and the rear enclosed for added durability and protection.