Trident Marine 6" ID 90-Degree Blue Silicone Molded Wet Exhaust Elbow w/4 T-Bolt Clamps [290V6000-S/S]6" ID 90 Degree Blue Silicone Molded Wet Exhaust Elbow with 4 T Bolt Clamps Trident silicone blend rubber marine wet exhaust connections. They are molded in very high temperature blue silicone EPDM blended rubber with a smooth bore and cover; except elbows of 6" I. D. or larger have molded reinforcing ribs on the outside. Features: Four stainless steel t bolt clamps Very high temp silicone EDPM blend rubber molded This elbow has excellent resistance