Corrosion-resistant high-temperature e-glass exhaust tubing designed to minimize exhaust gas and cooling water flow restriction 8 inch Vernatube Exhaust Tubing, Sold Per Foot | Centek 1100508 Verna Tube 8 in. Resin impregnated glass filament tubing wound exclusively with a new fire retardant resin formulated for high temperature applications Vernatube exceeds values for the class of materials designated as self extinguishing Per ASTM-D-635 UL94V-O and the US Navy/USCG MIL-R-21607 and MIL-R-757 The smooth resin rich I.D. assures minimal flow restrictions to exhaust gases and cooling water flowing through the tubing The precise O.D. dimensions facilitate perfect connections between sections of the tubing and flexible joints or hoses Nominal O.D. 8 in. Nominal wall .154 Sold per ft. Standard length 10 ft.