Trident Marine 4" ID 90-Degree Blue Silicone Molded Wet Exhaust Elbow w/4 T-Bolt Clamps [290V4000-S/S]4" 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. Features: Four stainless steel t bolt clamps Very high temp silicone EDPM blend rubber molded This elbow has excellent resistance to ozone, salt water, diesel fumes, splash, cold, heat, and aging Exceeds (SAE