Trunk Duct Transition Increaser/Reducer Fittings

Upgrade your ductwork with our Trunk Duct Transition Increaser/Reducer Fitting, available in all 8" trunk sizes. These fittings feature slip and drive connections, one-side tapering, and are designed to reduce the rectangular trunk duct from a larger size to a smaller size. Each fitting is 8" long, includes 2 drive cleats per fitting, and is crafted from durable 26-gauge galvanized sheet metal. Made in the U.S.A., these fittings are available in all sizes to suit your ductwork needs.

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