Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 34 L, Cylinder Diameter 3.13 in, Cylinder Height 10.64 in, For Use With All OEM Gas Detectors, Gas Mixture Carbon Monoxide 100 ppm, Methane (50 Percent LEL) 2.5 Percent, Oxygen 18 Percent, Sulfur Dioxide 10 ppm, Gas Type Carbon Monoxide, Methane, Oxygen, Sulfur Dioxide, Product Type Calibration Gas, Chemical Formula CH4, CO, O2, SO2, CAS Number 630-08-0, 74-82-8, 7446-09-5, 7782-44-7, Accuracy +/-5 Percent