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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24
Nylon bushings on adjustable blades to prevent metal on metal rattle
904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 12" Duct Opening (front blades parallel to shortest dimension)
904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 8" Duct Opening (front blades parallel to shortest dimension)
Free area equals more than 75% of nominal size
Standard Features * Extruded aluminum construction with steel multi-shutter damper * Margin edges are 7/8" projection for baseboard installation * Nylon bushings for easy adjustment and quiet setting of airfoil blades running parallel to shortest dimension * Countersunk mounting holes for flush appearance
Parallel Volume Damper Low Leak 3000PLL-66X24 Specialty Products Nylon bushings on adjustable bladesh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control
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