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 50 ppm, Hydrogen Sulfide 25 ppm, Isobutane (50 Percent LEL) 0.95 Percent, Oxygen 12 Percent, Gas Type Carbon Monoxide, Hydrogen Sulfide, Isobutane, Oxygen, Product Type Calibration Gas, Chemical Formula C4H10, CO, H2S, O2, CAS Number 630-08-0, 75-28-5, 7782-44-7, 7783-06-4