(Humidified) Carbon Monoxide CO, Methane CH4, Oxygen O2 Calibration Gas or Cal Gas with a concentration of 200 PPM Carbon Monoxide CO, 50% LEL Methane CH4, 19% Oxygen O2 balance Nitrogen contained in 34LS Aluminum Alloy Cylinder that is used for calibration and maintenance of gas detectors. Connection size CGA600, Pressure 500 PSI, Cylinder 34LS Aluminum Alloy, Diameter 3.125 inches, Cylinder Height 10.64 inches, Weight 30.9 oz, Contents 1.2 cu. ft. Use with regulators 71,72-MFV/17,CV-2,75-DFR-CGA600
NIST Calibration Certificate Included. GASCO Calibration Gas is ISO 9001 Certified.