Opposed Blade Volume Damper 3000-0BD-20X18 T-Bar Note: Sizes listed are the

Note: Sizes listed are the duct or opening size the grille will fit into

Opposed Blade Damper standard on 4" widths

Steel galvaneal construction

055 T6 aluminum surface mount return air grille * 0 fixed blades parallel to longest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * 907 O - recessed screwdriver operated opposed blade damper * No Labor Collar (square sizes only) * 900 T - T-Bar mount * 905 HD - reinforced construction * 905 IS - insect screen * 1335-1338 Series - stainless steel version * Fractional

Minimum size 4"x4"

Opposed Blade Volume Damper 3000-0BD-20X18 T-Bar Note: Sizes listed are theh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee 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.