Master Flow 4 in. to 3 in. Round Reducer

The Master Flow 4 in. x 3 in. Round Reducer is made of galvanized steel. It features hemmed collar edges for enhanced strength and a secure fit. The reducer is used to transition from a 4 in. pipe to a 3 in. pipe in an HVAC system. It is suitable for most HVAC applications.|30-Gauge, galvanized steel construction for durability|Hemmed collar edges for an improved fit and increased strength|Connects 4 in. pipe to 3 in. pipe in duct run|Seal seams with code-approved mastic, sealant or duct tape (sold separately)|Always insulate ductwork for greater system efficiency and comfort (insulation not included)