UN1954 COMPRESSED GAS, FLAMMABLE N.O.S., (METHANE, ETHANE) 2.1 1% ARGON (STIMULANT REPLACED OXYGEN), 2.5% NITROGEN, 1% CARBON DIOXIDE, 5% ETHANE, 3% PROPANE, 1% ISOBUTANE, 1% N-BUTANE, 0.5% ISO-PENTANE, 0.5% N-PENTANE, 0.25% HEXANES PLUS, 50 PPM HYDROGEN SULFIDE, METHANE BALANCE CERTIFIED, SIZE 150AL CUSTOMER OWNED CYLINDER