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 Monoxide 3,000 ppm, Gas Type Propane, Product Type Calibration Gas, Chemical Formula CO, CAS Number 630-08-0, Accuracy +/-2 Percent, Background Gas Nitrogen, Calibration Certificate NIST, Cylinder Material Aluminum Alloy, Outlet Connection Size 5/8 In.-18, Outlet Connection Type UNF