Features: Thread: 1/2-inch , nominal diameter :8mm. There are 4 standard- for your option: 110V/220V/12V/24V. Because of the high temperature inside the boiler-, the for valve is made of high temperature resistant materials. The solenoid for valve is mainly used for the water inlet for valve on the- water boiler-. Made of high-quality plastic and metal materials and has a long service life. Specifications: Material: plastic+stainless steel Thread: 1/2-inch Voltage: 110V/220V/12V/24V Nominal diameter :8mm Pressure environment: High pressure Flow direction: unidirectional Purpose: Water intake- control Type (channel location): Pilot Object: Water heater and boiler- Package Includes: 1x Solenoid Water for Valve note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.