Volume Damper Low-Leak OBD 3000-0BDLL-68X20 Specialty Products 7/8” Wide x 7/8” High

7/8” Wide x 7/8” High square holes

53% free area * 1306: 3/4" lattice opening

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 4" Duct Opening  (front blades parallel to shortest dimension)

115T Series Engineering/Performance Data

Volume Damper Low-Leak OBD 3000-0BDLL-68X20 Specialty Products 7/8” Wide x 7/8” Highh3. 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.