The NC Manual pull station is a high quality non toxic die-cast manual pull station manufactured entirely in the U.S.A. These units are very dependable Manual Stations intended for simple yet failsafe operation. Features include a heavy duty plunder type actuating switch, factrolite single strength type glass plate that inhibits false alarms, glass breakable by other objects besides the steel rod attached, and ability to mount in a standard electrical outlet box. The model NC-S3 is physically identical to the S1 and S2 models, but with the difference of a Micro Switch actuator.