Shields Marine Exhaust/Water Hose is reinforced with 2 or 4 plies of synthetic cord and is made of black, heavy-walled synthetic rubber. This hose is primarily used for straight connections in wet exhaust systems and engine water circulation lines. It is resistant to engine heat, exhaust fumes, ozone, mild chemicals, antifreeze, and saltwater. This hose also has double the ozone resistance required by AEJ2006. The temperature ranges from -20°F - + 200°F continuous, +250°F intermittent. The hose meets SAE J2006 Type R1 standards.