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 100 ppm, Pentane (30 Percent LEL) 0.42 Percent, Gas Type Carbon Monoxide, Oxygen, Pentane, Product Type Calibration Gas, Chemical Formula C5H12, CO, O2, CAS Number 109-66-0, 630-08-0, 7782-44-7, Accuracy +/-5 Percent, Background Gas Air, Calibration Certificate NIST