Volume Damper Low-Leak OBD 3000-0BDLL-40X34 Residential Registers & Grilles Options * Sleeve variations *

Options * Sleeve variations * Fractional and odd sizes available h3

Countersunk mounting holes for flush appearance with stainless sheet metal screws

Concealed mounting holes with mounting screws

parallel to longest dimension

Volume Damper Low-Leak OBD 3000-0BDLL-40X34 Residential Registers & Grilles Options * Sleeve variations *h3. 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.