Hard Duck is 100% made in the U.S.A.

Coupling Non Sealed

High performance dryer vent fittings for hard metal duct, Increases air flow and does not trap lint. Used for installing electric or gas clothes dryers these fittings require no crimping but do require foil tape. Best venting supplies.


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  • What is the diameter

    The coupling like all the fittings have two diameters, the entrance made smaller to slide inside 4" duct with a 3 7/8" diameter. The exit has a 4 1/8 diameter to slide over the receiving fitting or duct 

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