The Master Flow 20 in. x 18 in. Round Reducer features 26-gauge， galvanized steel construction for durability. The hemmed collar edges provide an improved fit and increased strength. The reducer is used to transition from a 20 in. pipe to a 18 in. pipe in an HVAC system. It is suitable for most HVAC applications.
26-Gauge， galvanized steel construction for durability
Hemmed collar edges for an improved fit and increased strength
Connects 20 in. pipe to 18 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)
Comment