Honeywell MS4104F1210 SKU: MS4104F1210 $463.06 $749.83 Quantity -+ In Factory Stock Details Honeywell MS4104F1210 : 2-Position Damper Actuator, 30in-ln Spring return, 120V NEMA 1, Includes 2 auxiliary switches SPST, fire and smoke application... Details Back DetailsHoneywell MS4104F1210 : 2-Position Damper Actuator, 30in-ln Spring return, 120V NEMA 1, Includes 2 auxiliary switches SPST, fire and smoke application.