UN1075 PETROLEUM GASES,LIQUEFIED 2.1 0.1% METHANE, 0.1% ETHANE, 0.1% ETHYLENE, 1% PROPANE, 1% PROPYLENE, 10% ISO-BUTANE, 0.6% TRANS-2-BUTENE, 0.5% 1-BUTENE, 0.4% ISOBUTYLENE, 0.3% CIS-2-BUTENE, 0.2% NEOPENTANE, 0.5% ISO-PENTANE, 0.5% N-PENTANE, 84.7% N-BUTANE CERTIFIED, SIZE 150AL W/510/580 DUAL PORT VALVE & DIPTUBE LIQUID PHASE