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Ships within 48 hours · Estimated delivery Nov 13 - Nov 18
accepts 6"-16" collar (collar by others)
* 3 hour rated * UL and California State Fire Marshall approved * 4-1/4" standard frame style * Interlocking steel roll-formed blade (3) with roll-formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G-90) * Self locking corner (4) * 165° replaceable fusible link (2) h3
2x4 T-Bar (22" x 46" duct)
904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 8" Duct Opening (front blades parallel to shortest dimension)
To adjust diffuser
Opposed Blade Volume Damper 3000-0BD-62X22 Step Down Ceiling Diffuser accepts 6"-16" collar (collar byh3. 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.
