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The McDaniel Metals MCDFSC4 is a duct board 4" start collar. Constructed from galvanized steel with a galvanized coating, this start collar is made in the USA. It is made with a 30 GA gauge and has a duct diameter of 4".
The McDaniel Metals MCDFSC4 duct board start collar is made of galvanized steel and is designed for 4" duct systems.
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