SIE16-291-500X400 EPDM Exhaust Reducer Elbow 5" x 4" Marine Hose FittingSIE16-291-500X400 EPDM reducer elbow is a marine-grade exhaust hose fitting designed to connect different diameter exhaust hoses in marine engine systems. This reducer transitions from a 5-inch to 4-inch hose connection, allowing secure adaptation between mismatched exhaust system components. Constructed from EPDM rubber, it is designed for marine exhaust applications where heat resistance, flexibility, and durability are required. It is suitable for use in marine wet exhaust systems where reliable hose transitions are needed.This fitting is commonly used in marine exhaust installations to ensure proper flow alignment while maintaining a secure, leak-resistant connection between hose sizes.