Product HighlightsA transition connects square or rectangular duct to a round pipe or round flexible duct.
California residents: see Proposition 65 Warning
Weight 4.13 Pounds Length 20.00 Inches Width 21.00 Inches Height 12.00 Inches Country of Origin USA Brand Southwark Galvanized Yes Diameter 18" Color Silver Composition Galvanized Steel Gauge 28 GA Size 20" x 21" to 18" Round
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