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The SOUTHWARK METAL #35 12-4 is a 4 in. trunk duct reducer designed for use with 12 in. ducts. Constructed from 28 gauge galvanized steel, this reducer is made with hot dipped galvanized steel per ASTM A653 CS type B. It is suitable for various HVAC applications.
Durable galvanized steel trunk duct reducer for connecting 4 in. ducts to 12 in. ductwork.
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