M30*1/230V/Normally Closed This thermal actuator is a two level kind switching system which has been tested by way of TUV It is often utilized to control radiator, surface heating formulation or zone valves It can automatically close the flux of formula beneath the management of room thermostatand different electric switch This model only can be utilized as on-off administrator Product 100% Real Display Package list: 1pc Electric Thermal Actuator Buckle joint You can manually keep the thermostat in operating situation M30*1 screw thread