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 Hazardous Material No Brand Malco Galvanized Yes Damper Type Round 6 inch Approvals HVAC Composition Galvanized Steel Gauge 28 GA Shape Round Size 6" Warranty Offered Yes SAE or Metric SAE Overall Length 13.75" Package Quantity 100
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