The DuraVent 3PPS-FAC is a flex coupler adapter from the PolyPro, a collection for polypropylene vent pipes. This flex coupler adapter is designed to be used to tightly connect one length of PolyPro flex to another. With a measurement of 3 inches in diameter, it is engineered to to operate at a higher temperature limit of 230-degree Fahrenheit and to be free from corrosion. This is a UL-listed product and is covered by DuraVents limited lifetime warranty.For your venting needs, you are assured that DuraVent can offer you the best and high-quality products. Search yours now at PlumbersStock.com.