Opposed Blade Volume Damper 3000-0BD-48X18 past 12 months Square to round 2" collar

Square to round 2" collar with roll formed retention bead - available in square sizes only

CSFM California State Fire Marshal listed

2" thin-line roll formed out-of-airstream frame

SD52 - Transition Box Spiral Pipe Grille (Single Deflection)

Single deflection radius mount spiral pipe grille with adjustable blades

Opposed Blade Volume Damper 3000-0BD-48X18 past 12 months Square to round 2" 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.