UN1965 HYDROCARBON GAS MIXTURE, LIQUEFIED (PROPANE, N-BUTANE) 2.1 1% METHANE, 5% ETHANE, 1% PROPYLENE, 15% ISOBUTANE, 19% N-BUTANE, 1% TRANS-2-BUTENE, 1% 1-BUTENE, 1% ISOBUTYLENE, 1% CIS-2-BUTENE, 7% ISO-PENTANE, 7% N-PENTANE, 19% N-HEXANE, PROPANE BALANCE CERTIFIED, 1000CC PISTON CYL CUSTOMER OWNED CYLINDER