4x12 Pellet Vent Pipe

DuraVent 4"Dx12"L Pellet Vent Pipe. It is fully unitized with twist lock construction and can be used in both vertical and horizontal installations. It has a 4-1/2" OD and is designed for stoves that burn wood pellets. It is a double wall and air insulated pipe with an inner wall of .012" super ferritic stainless steel and an outer wall of .018" laser welded galvalume. It is patent pending venting for stoves and inserts that use wood pellets. It is UL listed for 3" clearance to combustibles in USA and Canada and is required for venting pellet appliance above 4,000'. Comes boxed.