Opposed Blade Volume Damper 3000-0BD-60X24 Smoke-Fire Damper round collar only) * 830

round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U

built-in vanities

Mounting holes with color matching 2" baseboard Phillips screws

Nylon bushings for easy adjustment and quiet setting of blades running parallel to shortest dimension

1" and 1 1/2"

Opposed Blade Volume Damper 3000-0BD-60X24 Smoke-Fire Damper round collar only) * 830h3. 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.