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.
Weight 32.39 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 8 inch Approvals HVAC Composition Galvanized Steel Gauge 28 GA Shape Round Size 8" Warranty Offered Limited Lifetime Package Quantity 100 Overall Length 13.75" SAE or Metric SAE
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