Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 58 L, Cylinder Diameter 3.53 in, Cylinder Height 14.25 in, For Use With All OEM Gas Detectors, Gas Mixture Carbon Monoxide 100 ppm, Hydrogen Sulfide 25 ppm, Methane (25 Percent LEL) 1.25 Percent, Oxygen 18 Percent, Pentane (50 Percent LEL), Gas Type Carbon Monoxide, Hydrogen Sulfide, Methane Oxygen, Product Type Calibration Gas, Chemical Formula CH4, CO, H2S, O2