From the PolyPro collection that is best used with your polypropylene vent pipes, brings to you the DuraVent 3PPS-SUP flex chimney support. This is designed to be used in supporting the support elbow inside a masonry chimney. With a size of 3 inches, this is made for double-wall construction. It also comes with mounting hardware and pipe support clamp.For your venting needs, you are assured that DuraVent can offer you the best and high-quality products. Search yours now at PlumbersStock.com.