Description Used to adjust pipe to desired length Adjustable from 12 - 18 in, eliminating the need to cut pipe Includes finishing band For installed length subtract 1-3/8 in per joint 6 in clearance to combustibles Withstands temperatures up to 1200 deg F of continuous operation 6 in Nominal, 6-1/2 in Outside Diameter, 12 - 18 in Length, Aluminized Steel Outer/Stainless Steel Inner, Black, ULC S641, UL 103, Model DSP