Flow rate controller for precise CO2 supply. If one source of CO2 is branched off, each line would need a separate Speed Controller.Item Specifics:The switch vavle is used for co2 diy System,suitable 6mm outside diameter air tube.Type: Pneumatic,Temperature: 0 to 60°C;Operating pressure : 0-10.2kgf/cm2(0-1MPa);Negative pressure : -750mmhg(10Torr);Item: Fittings / Connectors;Fluid: Air - Water - Vacuum;Pressure: 0-10 bar Maximum;Quick and Reliable connections;Convenient elliptical sleeve configuration;Easy and quick tubing connections with no special tools required.