DuraVent® 46DVA-36B, Double Wall Pipe, Series: DirectVent Pro, 4 in Diameter, 24 ga Inner Pipe/28 ga Outer Pipe Gauge, Galvanized Steel/Aluminum, Black
DuraVent® 46DVA-36B, Double Wall Pipe, Series: DirectVent Pro, 4 in Diameter, 24 ga Inner Pipe/28 ga Outer Pipe Gauge, Galvanized Steel/Aluminum, Black