Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 66 L, Cylinder Diameter 3.13 in, Cylinder Height 10.64 in, For Use With All OEM Gas Detectors, Gas Mixture Carbon Monoxide 250 ppm, Hydrogen Sulfide 40 ppm, Methane (50 Percent LEL) 2.5 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