The DuraVent 5DFSW-20 is a flexible chimney liner from the DuraFlex Series, a collection that produces durable chimney pipes and venting accessories. This liner is designed to connect to a tee or an adapter. It comes with flexible components that add flexibility for easy installation. Appliances fueled with wood, gas, and pellet are compatible with this chimney liner. It also comes in a stainless steel finish for added resistance against corrosion. This flexible liner features a 5-inch inner diameter and has a length of 20-foot. Duravent provides a limited lifetime warranty for the DuraVent 5DFSW-20 chimney liner. It is also a UL listed for meeting the standard for safety. In cooperation with DuraVent, we at PlumbersStock carry high-quality products like this flexible liner for a very affordable price.