Volume Damper Low-Leak OBD 3000-0BDLL-54X54 Step Down Ceiling Diffuser 2" ADC compliant round collar

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

91 Series Submittal

700 CB30 - three way

Square to round transition collar

375 Series Submittal

Volume Damper Low-Leak OBD 3000-0BDLL-54X54 Step Down Ceiling Diffuser 2" ADC compliant round collarh3. 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.