Polyethylene single wall and dual wall (N-12) pipe and culvert are a long lasting permanent way to replace the old tin-horn culvert of the past. Upset ends means there’s no couplings to buy. 20′ joints. Diameters available in our stock: 12″,15″, 18″, 24″, 30″, 36″, 42″, 48″. Other sizes available on order as well as fittings for any size. Give us a call for more information.