View cart “#3417: Bulkhead fitting” has been added to your cart. #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 #367200: Diesel Tank Adapter with filter $69.00 Add to cart #3417: Bulkhead fitting $40.00 Add to cart #4401: 3.5″ Warm Air Duct Insulation (per foot) $7.00