DuraFlex SS Stainless Steel Chimney Liner - 8“ x 25-ft. - 8DF316-25: This unit requires venting pipe with an inner diameter of 8". The DuraFlex SS chimney liner system combines a stainless-steel liner with the DuraFlex Insulation Sleeve to create a solution that meets the UL 1777 standard for zero clearance to masonry. This liner portion is 8" in diameter and is 25 feet long. It's produced from a 0.006" thick material. It is thicker than other types of light chimney liners, making it more durable. Because of the low cost, it is the most cost-effective liner for straight chimneys. It comes with a manufacturer's limited lifetime warranty.

DuraFlex 25 Stainless Steel Chimney Liner 8-in. diameter Light-weight .006" metal thickness makes it stronger than other light liners Most economical liner for straight chimneys Manufacturers limited lifetime warranty