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 Propane (33.33 Percent LEL) 0.7 Percent, Gas Type Propane, Product Type Calibration Gas, Chemical Formula C3H8, CAS Number 74-98-6, Accuracy +/-2 Percent, Background Gas Air, Calibration Certificate NIST, Cylinder Material Aluminum Alloy, Outlet Connection Size 5/8 In.-18, Outlet Connection Type UNF