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 Carbon Dioxide 20 ppm, Gas Type Carbon Dioxide, Product Type Calibration Gas, Chemical Formula CO2, CAS Number 124-38-9, Accuracy +/-5 Percent, Background Gas Nitrogen, Calibration Certificate NIST, Cylinder Material Steel, Outlet Connection Size 5/8 In.-18, Outlet Connection Type UNF