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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16
To adjust diffuser
69% free area * 1308: 7/8" lattice opening
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 14" Duct Opening (front blades parallel to shortest dimension)
Maximum dimension 60x60 single
Fractional Sizes
Parallel Volume Damper Low Leak 3000PLL-60X20 Commercial To adjust diffuserh3. 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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