Opposed Blade Volume Damper 3000-0BD-60X46 Commercial Square collar designed for 20”

Square collar designed for 20” × 20” duct

T-Bar hinged 2 Cone Step Down Diffuser with Round Collar

Steel multi-shutter damper

For evaporative cooling or high velocity exhaust applications

with color matching Phillips posi-drive screws * All component parts

Opposed Blade Volume Damper 3000-0BD-60X46 Commercial Square collar designed for 20”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.