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Holds up to 1" filter (not included)
listed Fire-Resistance Diffuser * 700 Series - T-Bar Lay-in Panel * TVB - Thermal Vapor Blanket * Square collar
Lever operated steel multi-shutter damper
Interlocking steel roll-formed blades
Hinged removable extruded aluminum face frame with signature line marks
Parallel Volume Damper Low Leak 3000PLL-22X20 Residential Registers & Grilles Holds up to 1" filterh3. 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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