UN1954 COMPRESSED GAS,FLAMMABLE, N.O.S. (ETHYLENE, NITROGEN) 2.1 1.5 PPM METHYL MERCAPTAN (CANNOT EXCEED 1.7 PPM), 4.0 PPM HYDROGEN SULFIDE, 4.0 PPM CARBONYL SULFIDE, 24.0 PPM HYDROGEN, 551.0 PPM NITROGEN, ETHYLENE BALANCE PRIMARY, SIZE 150AL MIRROR FINISH CYLINDER CUSTOMER OWNED CYLINDER