Volume Damper Low-Leak OBD 3000-0BDLL-72X72 T-Bar 3/16” holes on 1/4” staggered

3/16” holes on 1/4” staggered centers

Standard Features * 4000 - door core grille with single frame * 4100 - door core grille with additional loose frame *

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

Standard Features *

Retainer cables are provided on sizes 12" and larger to allow the inner cones to hang securely while adjusting the diffuser

Volume Damper Low-Leak OBD 3000-0BDLL-72X72 T-Bar 3/16” holes on 1/4” staggeredh3. 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.