Hard Duck is 100% made in the U.S.A.
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Coupling Non-Sealed is a high-performance metal fitting hard metal duct for dryer vents. It is best to increase the flow of air. Another feature which makes it suitable for vent system is the quality that it does not trap the lint.
It can be used to install electric or gas clothes dryers. As it does not require crimping, so the installation process is ten times more accessible than other coupling non-sealed components. You only need a foil tape to install it. The quality material of the product will last longer than your expectations. A little investment on our vent supplies will save you hundreds of dollars which you might spend on frequent maintenance and parts replacement.
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
$14.50
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