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Extruded aluminum frame with steel roll formed blades and steel multi-shutter damper
22 gauge butterfly style galvanized steel blades
375 Series Engineering/Performance Data
T-Bar Modular Core Diffuser with Round Collar 18-20
Parallel Volume Damper Low Leak 3000PLL-28X10 Specialty Products Extruded aluminum frame with 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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