#4414: 60/75 mm Warm Air Duct Adapter$27.00 #4414: 60/75 mm Warm Air Duct Adapter quantity Add to cart Description Description The Wallas #4414 adapts 75mm (3″) ducting to 60mm or 65mm (2.5″) ducting. Related products Add to cart #2460: Exhaust Vent (closeable duplex) $271.00 Add to cart #3417: Bulkhead fitting $40.00 Add to cart #3411: 75mm (3″) Warm Air Register $53.00