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 Monoxide 100 ppm, Methane 1,000 ppm, Gas Type Carbon Monoxide, Methane, Product Type Calibration Gas, Chemical Formula CH4, CO, CAS Number 630-08-0, 74-82-8, Accuracy +/-5 Percent, Background Gas Air, Calibration Certificate NIST, Cylinder Material Steel, Outlet Connection Size 5/8 In.-18