Volume Damper Low-Leak OBD 3000-0BDLL-54X48 past 12 months Heavy Duty ConstructionMRI CompatibleInsect Screen

Heavy Duty ConstructionMRI CompatibleInsect Screen

w/ Steel Opposed Blade Damper

Narrow ceiling grid dimples for 9/16" T-Rails

Center margins are mounted on the backside of the grille for a streamlined continuous look

Square Collar

Volume Damper Low-Leak OBD 3000-0BDLL-54X48 past 12 months Heavy Duty ConstructionMRI CompatibleInsect Screenh3. 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.