Chimney Supplies | Round Stainless Steel Band Mount - For Use on Clay or Metal ChimneysTo determine the correct size chimney cap, simply measure the outside diameter of the flue and pick the same size cap - the adjustable band on these chimney caps simply adjusts and tightens up to the side of the flue. For example, the 6" size will fit outside measurements of 5 1/2 inches to 6 1/2 inches Guaranteed Price and Free Shipping |