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Heavy gauge cold roll steel
Blades are parallel to the shortest dimension
Step down core designed for 4-way uniform air distribution
4-Way ceiling register with stiffened 1/2" fan shaped louvers for silent operation
Install with louvers in up or down position for best duct concealment
Parallel Volume Damper Low Leak 3000PLL-44X26 Smoke-Fire Damper Heavy gauge cold roll steelh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee 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. Options * 3000 PLL Low Leak Air Control
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