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Ships within 48 hours · Estimated delivery Oct 16 - Oct 21
Standard Features *
904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 6" Duct Opening (front blades parallel to shortest dimension)
Nylon bushings for easy adjustment and quiet setting of blades running parallel to shortest dimension
* 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
Standard Features * 4000 - door core grille with single frame * 4100 - door core grille with additional loose frame *
Volume Damper Low-Leak OBD 3000-0BDLL-72X72 T-Bar Standard Features *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.
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