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DW10X21TO16DWSQRNDADPEC3ASY-3R-S-NS
Double Wall Duct - 10" X 21" To 16" SQ2RND Eccentric Adapter - 3 Layers Reduced Clearance - 16" X 27" To 22" Stainless Steel Outer Shell. Non-Standard Eccentric Adapter, 2 Week Lead Time.