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3-1/4" x 10" x 4'' Galvanized Rectangular to Round Duct Transition, 4" Diameter Microwave Exhaust Vent Kit Round Transition for Connecting HVAC Duct Pipe Fittings
3-1/4" x 10" x 4'' Galvanized Rectangular to Round Duct Transition, 4" Diameter Microwave Exhaust Vent Kit Round Transition for Connecting HVAC Duct Pipe Fittings

R-394