UN1956 COMPRESSED GAS, N.O.S. (ARGON, NITROGEN) 2.2 0.25 PPM CARBON DIOXIDE, 0.25 PPM ACETYLENE, 0.25 PPM ETHYLENE, 0.25 PPM ETHANE, 0.25 PPM HYDROGEN, 40,000 PPM OXYGEN, 90,000 PPM NITROGEN, 0.25 PPM METHANE, 0.25 PPM CARBON MONOXIDE, ARGON BALANCE PRIMARY STANDARD, SIZE 150AL CUSTOMER OWNED CYLINDER