Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 74 L, Cylinder Diameter 4.25 in, Cylinder Height 14.25 in, For Use With All OEM Gas Detectors, Gas Mixture Carbon Monoxide 60 ppm, Hydrogen Sulfide 20 ppm, Methane (50 Percent LEL) 2.5 Percent, Oxygen 15 Percent, Gas Type Carbon Monoxide, Hydrogen Sulfide, Methane, Oxygen, Product Type Calibration Gas, Chemical Formula CH4, CO, H2S, O2, CAS Number 630-08-0, 74-82-8, 7782-44-7, 7783-06-4, Accuracy +/-5 Percent