From the PolyPro collection, designed for use on polypropylene vent pipes, brings to you the DuraVent 2PPS-FLEX35 flex length. This is used in lining the masonry chimneys that are venting the condensing appliances. With 2-inch diameter and 35-foot length, this can be cut for precise length. This is applicable for a double-wall construction and is considered a UL-listed product.DuraVent is proud of their wide array of products specially made for your different venting system. Search the one that you need here at PlumbersStock.com!