Features: Brass casting structure Brass, wear-resistant and reliable, accurate anti-corrosion. The pressure regulating valve (constant flow valve) functions like a water flow switch. This solenoid valve not only keeps constant current flowing steadily, but also prevents dry burning and monitors flow. Easy to install and maintain. No power consumption, with direct and stable water regulation. High quality normally closed electric solenoid valve for air ,water or oil. Suitable for many fields: irrigation control (gardens, farms, etc.), liquid control (pipes, artificial rivers, etc.) and air control (laboratory, factory, etc.) Package Includes: 1x Electric Solenoid Valve Specifications: Material: Brass Thread Size: 1/2" Size: Approx. 6x6.4cm/2.36x2.52inch Working Altitude: 2500m/8202ft Working Temperature: 0-40 Working Humidity: 5 > 11 > 18 > 32 Life: > 100,000 Times note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.