Parallel Volume Damper Low Leak 3000PLL-46X16 Step Down Ceiling Diffuser Countersunk mounting holes with color

Countersunk mounting holes with color matching Phillips Pozidriv screws

Adjustable blades oriented for 3 or 4-way air flow pattern

904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 20" Duct Opening (front blades parallel to shortest dimension)

Spiral Diffuser Radius Flush Mount Diffuser Single Deflection with Damper

955 Series Engineering/Performance Data

Parallel Volume Damper Low Leak 3000PLL-46X16 Step Down Ceiling Diffuser Countersunk mounting holes with colorh3. 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