Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 105 L, Cylinder Diameter 3.2 in, Cylinder Height 12.8 in, For Use With All OEM Gas Detectors, Gas Mixture Carbon Dioxide 4 Percent, Oxygen 16 Percent, Gas Type Oxygen, Product Type Calibration Gas, Chemical Formula O2, CAS Number 7782-44-7, Accuracy +/-2 Percent, Background Gas Nitrogen, Calibration Certificate NIST, Cylinder Material Aluminum Alloy, Outlet Connection Size 5/8 In.-18