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 Methane (2.4 Percent LEL) 0.12 Percent, Oxygen 17 Percent, Gas Type Ammonia, Product Type Calibration Gas, Chemical Formula NH3, CAS Number 7664-41-7, Accuracy +/-2 Percent, Background Gas Nitrogen, Calibration Certificate NIST, Cylinder Material Aluminum Alloy, Outlet Connection Size 5/8 In.-18