1.4C200series is 3 way valve, solenoid valve,electronic pneumatic valve,pneumatic valve 2.best quality and good service 4C200series is 3 way solenoid valve which divided into 4 kinds ... ,DC24V), 4C230-08(AC220V,AC24V,DC24V).PS:the volt of solenoid choose is according to customer required. 2.Feature and size: Pneumatic Solenoid Valve