Damper, Product Type Damper, Compatible with Grainger Part Number 3C131, 3C132, 3C234, 3C235, 3C315, 3C725, 3C726, 3C727, 3C728, 3C729, 3C730, 3C731, 3HHP3, 3HHP4, 4C560, 4C561, Compatible with Manufacturer Model Number AMD/GMD 12 in, AMD/GMD 16 in, AMD/GMD 20 in, AMD/GMD 24 in, AMD/GMD 30 in, AMD/GMD 36 in, AMD/GMD 42 in, AMD/GMD 48 in, AMD/GMD 54 in, AMD/GMD 60 in, Nameplate Voltage 100 to 240V AC, Frequency 50/60 Hz, Compatible with Brand ACP Shutters