Volume Damper Low-Leak OBD 3000-0BDLL-50X46 Commercial Standard Features * Removable core

Standard Features * Removable core * Available in five air patterns * 22 gauge steel flush core provides uniform air distribution * Square to round No Labor Collar (6" thru 18") * 2x2 galvaneal steel panel with seismic support holes * Soft White Options * 700DVD D - steel multi-shutter damper * 700DVD O - opposed blade damper * 700DVD FR - U

Building materials rated 3 hours or less

Countersunk mounting holes with color matching Philips posi-drive screws

Use for applications with round ductwork to create a clean and easy to install finish for your round registers or diffusers

Hinged perforated face with screwdriver access to release

Volume Damper Low-Leak OBD 3000-0BDLL-50X46 Commercial Standard Features * Removable coreh3. 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.