UN1954 COMPRESSED GAS,FLAMMABLE N.O.S. (METHANE, NITROGEN) 2.1 5.0% ETHANE, 1.0% PROPANE, 0.3% ISOBUTANE, 0.3% BUTANE, 0.1% ISO-PENTANE, 0.1% N-PENTANE, 0.03% HEXANE, 0.1% 2,2 DIMETHYLPROPANE (NEOPENTANE), 2.5% NITROGEN, 1.0% CARBON DIOXIDE, METHANE BALANCE PRIMARY, SIZE 80AL CUSTOMER OWNED CYLINDER