These couplers provide a low-cost way to piece together two lengths of exhaust hose to obtain the length you need.Your wet exhaust system circulates hot gases and saltwater, rapidly corroding its galvanized fittings, which may ultimately crumble and vent dangerous gases belowdecks. Tridents fire-retardant, heat-resistant and corrosion-proof fiberglass connectors are the safe, low-cost solution. Must be installed a minimum of 2' downstream from the point of cooling water injection (250F max. continuous operating temperature).Key Features250F (121C) max. continuous operating temperatureFire resistant, Marine UL Listed, ABS Type approvedMust be installed minimum of 2' downstream from cooling water injection pointCan be used to join rubber and/or silicone wet exhaust components2", 3", 4", 5", 6" O.D. sizes