Volume Damper Low-Leak OBD 3000-0BDLL-40X34 Residential Registers & Grilles T-Bar Modular Core Diffuser with

T-Bar Modular Core Diffuser with Round Collar 18-20

Spiral Diffuser Radius Flush Mount Diffuser Single Deflec

Available in 4" through 29" round

Concealed mounting holes with mounting screws

2550 Series Submittal

Volume Damper Low-Leak OBD 3000-0BDLL-40X34 Residential Registers & Grilles T-Bar Modular Core Diffuser withh3. 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.