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Ships within 48 hours · Estimated delivery Aug 17 - Aug 22
14 gauge steel construction
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 20" Duct Opening (front blades parallel to shortest dimension)
Hand operated level for easy filter access and cleaning
Double deflection surface mount grille with adjustable airfoil blades
Parallel Blade Volume Damper 3000P-60X50 Step Down Ceiling Diffuser 14 gauge steel constructionh3. 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
