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remove the two center cones as a unit and reposition the six screws
*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
Non-standard size collar (available in 6" through 20")
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 10" Duct Opening (front blades parallel to shortest dimension)
Architectural Lattice Grilles 1308-40x20 past 12 months remove the two center conesStandard Features 1 rim size (2 larger than nominal duct size order size) 14 gauge steel construction Countersunk mounting holes for a flush appearance 7 8 Wide x 7 8 High square holes. 1 4 crossbars, with 60% free area Options 14 GA 304 SS Construction Fractional Sizes Tamper proof Screws *Pricing is based on standard 14 GA steel construction. Please contact us for a quote on options. tony@registers direct. com
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