Volume Damper Low-Leak OBD 3000-0BDLL-48X16 Residential Registers & Grilles Minimum size is 4"x4"

Minimum size is 4"x4"

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

Square collar designed for 22" x 22" duct

Blades are parallel to the shortest dimension

Opposed Blade Damper standard on 4" widths

Volume Damper Low-Leak OBD 3000-0BDLL-48X16 Residential Registers & Grilles Minimum size is 4"x4"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.