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 50 ppm, Hydrogen Sulfide 25 ppm, Methane (50 Percent LEL) 2.5 Percent, Oxygen 19 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