Volume Damper Low-Leak OBD 3000-0BDLL-20X22 T-Bar Minimum size is 4"x4"

Minimum size is 4"x4"

Standard Features * Airflow can be adjusted to 1

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

Designed for high volume air delivery

Perforated face grille

Volume Damper Low-Leak OBD 3000-0BDLL-20X22 T-Bar Minimum size is 4"x4"h3. 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.