DuraFlex SS Stainless Steel Chimney Liner - 5" x 15-ft. - 5DF316-15: A 5" inner diameter vent pipe is required for this unit. For straight chimneys, the DuraFlex SS stainless steel chimney liner is the most cost-effective option. It has a thin wall thickness of 0.006" that makes it stronger than other light liners. Because of its flexibility, it can accept obstructions without the use of elbows or section piecing. This item includes 15 feet of DuraFlex SS with a 5" diameter that can be used to vent gas, wood pellet, oil, or wood appliances such as fireplace inserts, furnaces, boilers, and water heaters. It comes with a limited lifetime warranty from the manufacturer.

DuraFlex 15 Stainless Steel Chimney Liner 5-in. diameter Light-weight .006" metal thickness makes it stronger than other light liners Most economical liner for straight chimneys Manufacturers limited lifetime warranty