Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 103 L, Cylinder Diameter 3.3 in, Cylinder Height 13.6 in, For Use With All OEM Gas Detectors, Gas Mixture Carbon Monoxide 50 ppm, Oxygen 19 Percent, Propane (25 Percent LEL) 0.525 Percent, Gas Type Carbon Monoxide, Oxygen, Propane, Product Type Calibration Gas, Chemical Formula C3H8, CO, O2, CAS Number 630-08-0, 74-98-6, 7782-44-7, Accuracy +/-5 Percent, Background Gas Nitrogen, Calibration Certificate NIST