Our selection of chimney caps includes Stainless Steel and Cast Concrete. Our stainless steel assortment is manufactured in Woodinville,WA. We source these from Reliance Manufacturing. They are designed to fit the tops of various sized clay flue liners. The sizes run from 9”X 9” to 17”X 17”. The outer frame of these caps fit over the outside edge of the flue liner and can be adjusted to fit tightly with SS bolts.