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Square to round transition collar
Countersunk mounting holes for flush appearance with color matching Phillips Pozidriv screws
916 Series Submittal
Steel galvaneal construction
Square to round 2" collar with roll formed retention bead
Parallel Blade Volume Damper 3000P-50X22 Specialty Products Square to round transition collarh3. 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
