DURAFLEX 3 x 25′ STAINLESS STEEL CHIMNEY LINER KIT FOR PELLET STOVES #3DF304-25KT. Flex liner is 25′ Long. Inner Pipe Diameter is 3. DuraFlex 304 liners are lighter and more economical. Excellent when there are minimal offsets in the chimney. Use with pellet burning appliances. DuraFlex 304SS is listed to UL 1777 and ULS S635. Construction material: Single wall. 005 304 Stainless Steel. Clearances: 0 to Masonry. Listings: Listed to UL 1777 and ULC S635. DuraFlex SS 3 Chimney Top Plate. DuraFlex SS 3 Rain Cap. Duraflex SS 3 Tee. Duraflex 304 Liner, 3 x 25′ Long. The item “DURAFLEX PELLET STOVE 3 Inner Diameter Stainless Steel Chimney Liner Kit 25″ is in sale since Friday, November 16, 2018. This item is in the category “Home & Garden\Home Improvement\Heating, Cooling & Air\Fireplaces & Stoves\Other Fireplaces & Stoves”. The seller is “usafireplace” and is located in Raymond, Maine. This item can be shipped worldwide.