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The Mitchell Metal Products MM-3488 is an eight-inch HVAC ductboard starting collar with crimp, made from twenty-six gauge galvanized sheet metal. This product is designed to connect to plenum, duct board, or other surfaces easily.
This starting collar features crimped edges for a secure fit and incorporates fingers on one side to assist in attachment. It includes two pre-punched holes for optional damper installation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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