Product HighlightsThese dampers feature 1/4" (6.4 mm) bearings which allows 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.
California residents: see Proposition 65 Warning
Weight 26.54 Pounds Length 13.75 Inches Width 12.25 Inches Height 9.50 Inches Country of Origin USA Brand Malco Galvanized Yes Damper Type Round 7 inch Approvals HVAC Color Gray Composition Galvanized Steel Finish Steel Gauge 28 GA Shape Round Size 7" Warranty Offered Yes Package Quantity 100 SAE or Metric SAE Overall Length 13.75"
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