Shields' marine exhaust/water hose is made of heavy-walled synthetic rubber and reinforced with synthetic cord.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 salt water.This hose also has double the ozone resistance required by SAEJ2006. Meets SAE J2006 type R1 standards Temperature range: -20 to 200 F continuous, +250 F intermittent Color: black