Product details:

These multi flue caps are installed on the top of the chimney cap and have a hinged base that can be mounted on the outside or inside of the Copper screen. If measuring from the outside dimension of the chimney please subtract 3 from the length measurement and 3 from the width measurement to allow for the top mount hinge . This style of multi flue has the unique look of a hip and ridge top. The Hip and Ridge top has a 10/12 pitch with an overhang of 3 3/4. The multi flue cap is made of 24 gauge/16 oz. Copper.