Volume Damper Low-Leak OBD 3000-0BDLL-72X68 Specialty Products 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille for a 16" x 8" Duct Opening   (front blades parallel to shortest dimension)

CB40 - four way * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * CB40 O - recessed screwdriver operated opposed blade damper * Square to round No Labor Collar (square sizes only) * 700 CB and CB T - T-Bar mount * SCB - steel version * Tamper proof screws * Standard Color

Options * MAR - Mounting Angle Ring (sold in pairs - 2 needed

HVL Series Engineering/Performance Data

Airfoil blades individually adjustable on 3/4" centers

Volume Damper Low-Leak OBD 3000-0BDLL-72X68 Specialty Products 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.