Spectre 4in X 3in Reducer Couplr SPE9766

Tubing Coupler - Straight - Reducer - 4 in to 3 in ID - 3-1/2 in Long - 4.0 mm Thick Wall - Silicone - Blue - Each

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