The DuraVent 7DF304-35 flexible chimney liner from the DuraFlex Series. This chimney liner is compatible for use with wood, gas, and pellet appliances. It is also designed to connect to a tee or an adapter. This chimney liner has flexible components that add flexibility for easy installation. It has a stainless steel finish for added resistance against corrosion. This chimney liner is backed by the manufacturer's limited lifetime warranty. It also features a 7-inch inner diameter and has a length of 35-foot.It is UL certified for meeting the standard for safety. Here at PlumbersStock, we take pride in offering our customers high-quality products like this chimney liner at very affordable prices.