Calibration Gas, CGA Number CGA 600, Container Type Cylinder, Cylinder Capacity 17 L, Cylinder Diameter 2.9 in, Cylinder Height 10.75 in, For Use With All OEM Gas Detectors, Gas Mixture Butane (39.4 Percent LEL) 0.75 Percent, Gas Type Butane, Product Type Calibration Gas, Chemical Formula C4H10, CAS Number 106-97-8, Accuracy +/-5 Percent, Background Gas Air, Calibration Certificate NIST, Cylinder Material Steel, Outlet Connection Size 3/4 in, Outlet Connection Type NGT, Standards ISO 9001:2015