Highlights: All-In-One Kit includes 6" or 8" x 25' or 35' Flex Liner, Rain Cap, Flashing Adapter, Flex Connector, and Tee w/ Cap all made of stainless steel Assembly required. Kit listed to UL1777 standards Chimneys in applications burning wood, oil, coal, or gas Flex liners reduce the size of chimney opening, so they require less heat to effectively exhausted fumes and prevent moisture build up It must be installed in masonry chimneys only