Parallel Volume Damper Low Leak 3000PLL-54X46 Residential Registers & Grilles 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille for a 48" x 18" Duct Opening (front blades parallel to shortest dimension)

Minimum size is 4"x4"

enclosed in valve to assure trouble-free operation

Hinged perforated face with screwdriver access to release

Fan shaped 1/2" spaced louvers

Parallel Volume Damper Low Leak 3000PLL-54X46 Residential Registers & Grilles 904 - Double Deflection Adjustableh3. 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