Volume Damper Low-Leak OBD 3000-0BDLL-22X12 past 12 months 2" thin-line roll formed out-of-airstream

2" thin-line roll formed out-of-airstream frame

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" 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

14 gauge steel construction

Volume Damper Low-Leak OBD 3000-0BDLL-22X12 past 12 months 2" thin-line roll formed out-of-airstreamh3. 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.