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These metal round 4 and 6 inch duct elbows are fully adjustable from 0 to 90 degrees, especially hel..
Rigid ductwork is usually preferable to flex duct because the air will flow more freely, but rigid d..
These increasers/reducers allow round ductwork to be increased from 4 to 6 inches or from 6 to 8 inc..
Galvanized Adjustable Aluminum Elbow - Fully adjustable from 0 to 90 degrees. Light gauge constructi..
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