Volume Damper Low-Leak OBD 3000-0BDLL-40X34 Residential Registers & Grilles 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 40" x 18" Duct Opening (front blades parallel to shortest dimension)

* 2634 - Square or rectangular Spring actuated (6) out-of-airstream fire damper for horizontal or vertical mount

700 CB20C - corner

Spiral Diffuser Radius Flush Mount Diffuser Single Deflec

Countersunk mounting holes for flush appearance with stainless sheet metal screws

Volume Damper Low-Leak OBD 3000-0BDLL-40X34 Residential Registers & Grilles 904 - Double Deflection Adjustableh3. 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.