Volume Damper Low-Leak OBD 3000-0BDLL-68X34 past 12 months Extruded aluminum frame with steel

Extruded aluminum frame with steel roll formed blades and steel multi-shutter damper

All steel parts with galvanized finish or zinc coating

Back blades are parallel to the longest dimension

2" ADC compliant round collar with bead for ease of installation

Center margins are mounted on the backside of the grille for a streamlined continuous look

Volume Damper Low-Leak OBD 3000-0BDLL-68X34 past 12 months Extruded aluminum frame with steelh3. 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.