Volume Damper Low-Leak OBD 3000-0BDLL-42X40 Residential Registers & Grilles linkage and handle enclosed in

linkage and handle enclosed in valve to assure trouble-free operation * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Steel multi-shutter damper * Soft White Options * 200 O - steel lever operated opposed blade damper * Tamper proof screws * Standard Color

Concealed mounting holes

Standard Features * Adjustable curved blade

Standard Features *

Free area equals more than 75% of nominal size

Volume Damper Low-Leak OBD 3000-0BDLL-42X40 Residential Registers & Grilles linkage and handle enclosed inh3. 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.