Interstate Pneumatics WRFCO2 CO2 Single Stage regulator with Flow Meter CGA 320 Inlet Easy-to-read 1.5 inch Pressure Gauge 0-3000 PSI with indicator of when tank needs to be refilled 17 feet long black 1/4 inch tubing CGA320 Inlet, Maximum Inlet: 3000 PSIG Manual valve (precise 0.5-15 cubic feet per hour settings) Self-centering flow tube keeps ball centered to assure flow accuracy