Product HighlightsThese dampers feature 1/4" (6.4 mm) bearings which allow for bearing holes to be made in round duct with the use of a scratch awl. To install, simply squeeze the pipe so that it is oval shaped, insert the damper into pre-punched bearing hole and the pipe will spring back to round when released, and secure with the wing nut(s) provided. The damper may be adjusted with a screwdriver.
Weight 21.13 Pounds Length 13.75 Inches Width 12.25 Inches Height 9.50 Inches Country of Origin USA Brand Malco Color Gray Size 6" Gauge 28 GA Composition Galvanized Steel Galvanized Yes Approvals HVAC Shape Round Warranty Offered Yes Damper Type Round 6 inch Finish Steel SAE or Metric SAE Overall Length 13.75" Package Quantity 100
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