Spectre 4in X 3.5in Reducer Coupler SPE9741

Tubing Coupler - Straight - 3-1/2 in to 4 in ID - 3 in Long - Clamps - Silicone - Black - Each

Fittings Hoses and Valves, Silicone Hose/Elbows/Adapters, Silicone Adapters/Elbows by SPECTRE