Duro Dyne & Ductmate Flange Connections SKU DOMH Please select DURODYNE H FLANGE 12'1200'/BNDDURODYNE J FLANGE 12' 1200'BNDDURODYNE J FLANGE 20' 1000'BNDDURODYNE J FLANGE 20' ALUMINUMDURODYNE J FLANGE 20'STAINLESSD/D J SPEED FLANGE W/HOLE 20' Log in to view price