Sierra Shieldsaust-C 2-78 Sierra Shieldsaust - C 1 Hose has a black synthetic black tube and cover. The Shieldsaust - C Hose is reinforced with double wire helix embedded between plies of synthetic cord and is abrasion resistant. Specifications I.D. 2 78 or 73mm O.D. 3 516 or 84mm Wt. C 137 Ply 2 Bend Radius 4 x I.D. Burst Pressure 175 PSI Working Pressure 60 PSI The temperature ranges from -20F to 200F continuous, 250F intermittent Applications Primarily used for wet exhaust connections with si