... way two-positon ,mufacturer supply. 4A series solenoid valve pneumatic control valve/normal closed single coilPneumatic solenoid valve, air control valve, fluid control valve, pulse valve, hand/mechanical control valve, valve ... gasAdapter's caliberG1/8''G1/4''1/8''1/4''3/8''3/8''1/2''Working pressure0~12air,water,oil,gas ...