DuraVent DuraTech 8" Inner Diameter All-Fuel Stainless Steel Chimney Pipe - 6" Length: A venting pipe with an inner diameter of 8" is required for this unit. This stainless steel double wall chimney pipe has two walls. The exterior wall is .016 inch thick stainless steel, while the inner wall is .020 inch thick stainless steel. It connects effortlessly with other components, thanks to the secure twist lock mechanism. with the same twist lock mechanism. Only a little twisting is required. Adaptors and adhesives are not required. The inside diameter is 8", while the outside diameter is 10".

6 Inch length Double-wall chimney pipe for wood oil coal and gas appliances .016" stainless steel outer wall and .020" stainless steel inner wall Insulated by a layer of ceramic refractory blanket Secure twist-lock connections 2" clearance to combustibles 8" inner diameter with a 10" outer diameter Limited lifetime warranty UL Listed