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 50 ppm, Hydrogen Sulfide 10 ppm, Methane (50 Percent LEL) 2.5 Percent, Gas Type Carbon Monoxide, Hydrogen Sulfide, Methane, Nitrogen, Oxygen, Product Type Calibration Gas, Chemical Formula CH4, CO, H2S, N2, O2, CAS Number 630-08-0, 74-82-8, 7727-37-9, 7782-44-7, 7783-06-4