Carbon Monoxide CO, Methane CH4, Hydrogen Sulfide H2S, Oxygen O2 Calibration Gas or Cal Gas with a concentration of 50 PPM Carbon Monoxide CO, 50% LEL Methane CH4, 25 PPM Hydrogen Sulfide H2S, 20.9% Oxygen O2 balance Nitrogen contained in 34L Aluminum Alloy Cylinder that is used for calibration and maintenance of gas detectors. Connection size C-10, Pressure 500 PSI, Cylinder 34L Aluminum Alloy, Diameter 3.125 inches, Cylinder Height 10.64 inches, Weight 30.9 oz, Contents 1.2 cu. ft. Use with regulators 70,73-PBR,74-DAF,70-FMV,70/SS
NIST Calibration Certificate Included. GASCO Calibration Gas is ISO 9001 Certified.