3/8" G Thread, Solid brass body, AC 24V The solenoid with directly move the plunger and close the orifice for any fluid or gas flow. Only open while energized. Can not be used in strong acid, strong base, waste water, industrial gas and other media containing many impurities. The arrow indicates the flow direction (horizontal mounting please). VITON GASKET- Viton is space age material that is very chemically inert. As such it is commonly used with gasoline, kerosine and other organic solvents. Some companies sell solenoid valves with NBR gasket and advertise gasoline use. DO NOT USE NBR gasket for gasoline (it will corrode the gasket and can cause serious gasoline leak and accident)., Manufacturer: U.S. Solid