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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20
stair risers
CB30 - three way
3 or 4 way patterns * Spring push release for easy access to adjust pattern controllers * Round No Labor Collar sizes: 6-10"
Standard Features * Cones are one-piece stamped construction providing a clean
Parallel Volume Damper Low Leak 3000PLL-58X52 Commercial stair risersh3. 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
