Sierra Shields Marine ExhaustWater Hose 12 x 12-12 Sierra Shields Marine ExhaustWater Hose 34 is made of black, heavy-walled synthetic rubber. The hose is resistant to engine heat, exhaust fumes, ozone, mild chemicals, antifreeze, and saltwater. Features Reinforced with 2 plies of synthetic cord Made of black, heavy-walled synthetic rubber Specifications I.D. 12 or 305mm O.D. 12 78 or 327mm Wt. C 1095 Length 12 12 Burst Pressure 120 PSI Working Pressure 40 PSI The temperature ranges from -20F -