Opposed Blade Volume Damper 3000-0BD-60X44 past 12 months Holds up to a 4"

Holds up to a 4" filter (not included) with filter retention tabs (FG4)

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 30" Duct Opening (front blades parallel to shortest dimension)

Narrow ceiling grid dimples for 9/16" T-Rails

Interlocking steel roll-formed blades

Opposed Blade Volume Damper 3000-0BD-60X44 past 12 months Holds up to a 4"h3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee 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.