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Fantech CKR64 4" x 6" Duct Coupler
Increaser or reducer for circular duct. Constructed of galvanized sheet metal. Enables you to increase duct size from 4" to 6" or decrease duct size from 6" to 4".
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It is great that WW offers this optional item, and at a very fair cost.
on 11-04-2015 by bruce
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