UN1954 COMPRESSED GAS,FLAMMABLE, N.O.S. (METHANE, HYDROGEN) 2.1 10% HYDROGEN, 3% HYDROGEN SULFIDE, 5% NITROGEN, 10% CARBON DIOXIDE, 10% ETHYLENE, 5% ETHANE, 10% PROPYLENE, 5% PROPANE, 2% ISOBUTANE, 1% N-BUTANE, 5% 1-BUTENE, 2% ISOBUTENE, 5% TRANS-2-BUTENE, 2% CIS-2-BUTENE, 1% ISOPENTANE, 2% N-PENTANE, 2% 1,3 BUTADIENE, 20% METHANE CERTIFIED, SIZE 150AL CUSTOMER OWNED CYLINDER