M G Duravent 6DVL-48 6 Inch x 48 Inch Dura-Vent DVL Double-Wall Black Pipe has been filling the supply and accessory needs of over 8, 000 sweeps hearth retailers masons and contractors for over 25 years. has the privilege of serving over 80% of the professionals in America.Founded by Robert Daniels Sooty Bob in 1978 has grown from a one-man operation to a national network of six warehouses and a manufacturing plant. From its headquarters in Fairfield Iowa plays a major role in providing for the industry. Connects wood-burning stoves to DuraTech and DuraPlus factory-built s .016 stainless steel inner wall with .18 aluminized steel outer wall Reduces clearance to combustibles to 6 for walls and 8 for ceilings 6 inner diameter and 7 1/8 outer diameter Easily joins with other Dura-Vent DVL Double-Wall Black Stovepipe products Sleek black finish 25-year warranty UL Listed Available in four lengths All pipe lengths have a 1 connection overlap, reducing the actual pipe length by 1