DuraFlex SS Stainless Steel Chimney Liner - 5" x 35 Foot - 7022TI-35: A 5" inner diameter vent pipe is required for this unit. Between the chimney pipe and the wall or masonry brick, a chimney liner provides an important layer of insulation. Dura Flex's flexible liner promises long-lasting durability as well as flexible and convenient installation. The liner is composed of stainless steel .005" thick with a special alloy that makes it light, flexible, and sturdy. The UL1777 standard for masonry chimneys and wood burning stoves is met by the liner. It can be used for many purposes, such as wood pellet oil and gas ventilation.

DuraFlex 35 Stainless Steel Chimney Liner 5" diameter Light-weight .005" metal thickness makes it stronger than other light liners Most economical liner for straight chimneys Manufacturers limited lifetime warranty