Calibration Gas, CGA Number Not Applicable, Container Type Cylinder, Cylinder Capacity 58 L, Cylinder Diameter 3.53 in, Cylinder Height 14.25 in, For Use With All OEM Gas Detectors, Gas Mixture Sulfur Dioxide 80 ppm, Gas Type Sulfur Dioxide, Product Type Calibration Gas, Chemical Formula SO2, CAS Number 7446-09-5, Accuracy +/-5 Percent, Background Gas Nitrogen, Calibration Certificate NIST, Cylinder Material Aluminum Alloy, Outlet Connection Size 5/8 in, Outlet Connection Type UNF