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 Pentane (32 Percent LEL) 0.45 Percent, Gas Type Nitrogen, Oxygen, Pentane, Product Type Calibration Gas, Chemical Formula C5H12, CAS Number 109-66-0, Accuracy +/-5 Percent, Background Gas Air, Calibration Certificate NIST, Cylinder Material Steel, Outlet Connection Size 5/8 In.-18