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Ships within 48 hours · Estimated delivery Aug 30 - Sep 4
Non-standard size collar (available in 6" through 20")
Ceramic fiber blade installation with fiberglass cover*
904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 8" Duct Opening (front blades parallel to shortest dimension)
w/ Tool Operated Opposed Blade Damper
Standard Features * Airflow can be adjusted to 1
Opposed Blade Volume Damper 3000-0BD-22X12 Accessories Non-standard size collar (available inh3. 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.
