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Airfoil blades individually adjustable on 3/4" centers
stair risers
904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 6" Duct Opening (front blades parallel to shortest dimension)
Steel multi-shutter damper
Note: Sizes listed are the duct or opening size the grille will fit into
Parallel Blade Volume Damper 3000P-46X16 T-Bar Airfoil blades individually adjustable onh3. 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
