Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 105 L, Cylinder Diameter 3.2 in, Cylinder Height 12.5 in, For Use With All OEM Gas Detectors, Gas Mixture Oxygen 18.0 Percent, Gas Type Oxygen, Product Type Calibration Gas, Chemical Formula O2, CAS Number 7782-44-7, Accuracy +/-5 Percent, Background Gas Nitrogen, Calibration Certificate NIST, Cylinder Material Aluminum, Outlet Connection Type C-10, Operating Pressure – Maximum 1,200 psi