Volume Damper Low-Leak OBD 3000-0BDLL-22X12 past 12 months 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 8" Duct Opening  (front blades parallel to shortest dimension)

Fan shaped 1/2" spaced louvers

14 gauge steel construction

4-Way ceiling register with stiffened 1/2" fan shaped louvers for silent operation

2" thin-line roll formed out-of-airstream frame

Volume Damper Low-Leak OBD 3000-0BDLL-22X12 past 12 months 904 - Double Deflection Adjustableh3. 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.