View cart “#4401: 3.5″ Warm Air Duct Insulation (per foot)” has been added to your cart. #3418 75mm duct coupling$25.00 #3418 75mm duct coupling quantity Add to cart Description Description #3418 75 mm duct coupling, includes two hose clamps Related products Add to cart #602307: 28/45mm Exhaust Adapter $59.00 Add to cart #602293: Drain Loop $122.00 Add to cart #4416: 75mm/60mm reducer for 3413 $41.00