Calibration Gas, CGA Number CGA 165, Container Type Cylinder, Cylinder Capacity 221 L, Cylinder Diameter 9 in, Cylinder Height 16.25 in, For Use With All OEM Gas Detectors, Gas Mixture Propane 1.4 Percent, Gas Type Propane, Product Type Calibration Gas, Chemical Formula C3H8, CAS Number 74-98-6, Accuracy +/-5 Percent, Background Gas Nitrogen, Calibration Certificate NIST, Cylinder Material Steel, Outlet Connection Size 3/4 in, Outlet Connection Type NGT, Standards ISO 9001:2015