Volume Damper Low-Leak OBD 3000-0BDLL-48X36 T-Bar 4-Way ceiling register with stiffened

4-Way ceiling register with stiffened 1/2" fan shaped louvers for silent operation

Minimum size is 4"x4"

904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 12" Duct Opening (front blades parallel to shortest dimension)

listed Fire-Resistance Diffuser * 700 Series - T-Bar Lay-in Panel * TVB - Thermal Vapor Blanket * Square collar

Installation Ring only

Volume Damper Low-Leak OBD 3000-0BDLL-48X36 T-Bar 4-Way ceiling register with stiffenedh3. 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.