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Square to round transition collar
Standard Features * 1/2" x 1/2" x 1/2" aluminum lattice face *
Low profile design for tight mechanical areas
2" ADC compliant round collar with bead for ease of installation
T-20 Tamper Proof Screws
Volume Damper Low-Leak OBD 3000-0BDLL-36X36 Residential Registers & Grilles Square to round transition 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.
