Solenoid valve is sensitive, does not freeze, is durable, air tight, and has good sealing.Electric drive, convenient and fast, can be used for silent oil?free pump solenoid valve accessories. Wide application range, can be used for gas, liquid, gasoline, kerosene, natural gas, air, etc. Operation is simple, the red and black wires are both positive and negative, and they can be used when they are connected to the circuit. We hope you have a good shopping experience.Please feel free to contact us at first if there is any problem,and we are always here to support you. The valve is made of aluminum alloy and plastic, durable, waterproof, and corrosion?resistant.