

680 Series all - steel construction
Available in one way deflection (681),two way deflection (682), three way deflection (683), or four way delflection (684)
1/2inch fin spacing set at 40 degrees
Multi-shutter valve
1 5/8 inch depth when fully opened
Used for ceiling or sidewall installations
Interlocking valve louvers for positive shut-off
Ideal for shallow duct installaions
Bright white enamel finish
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