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 Oxygen 19 Percent, Pentane (25 Percent LEL) 0.35 Percent, Gas Type Oxygen, Pentane, Product Type Calibration Gas, Chemical Formula C5H12, O2, CAS Number 109-66-0, 7782-44-7, Accuracy +/-5 Percent, Background Gas Nitrogen, Calibration Certificate NIST, Cylinder Material Steel