Features: The actuator is connectting to the thermostat for use, according to the set temperature automation management pipelines Valves opening and closing, maintain room temperature. Adopts semiconductor heating ceramics, which can heat up quickly, control room temperature accurately, and enhances the comfort of your home. Our actuators is mounted with nut (30x1.5mm), which can be manually rotated to install without the use of additional tool, making installation and removal very convenient. It mainly used in floor heating system in the Radiants Heat Manifold, radiator, water to air heat exchyanhger. The use of electrothermal actuator valves can effectively adjust the water flows of floor heating supply and return pipe to achieve the purpose of energy saving and efficiency enhancement. Specifications: Materials: Flame retardant nylons Type: about normally open/normally closed (optional) Size: 5.6x3.6cm/2.2x1.42inch Wire length: about 65mm/2.56inch Working frequency: 50/60HZ Voltages ranges: 24V Power consumption: ≤3W Package Includes: 1pc Electric Thermal Actuator note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.