CH 0.5% ETHANE 0.5% ETHYL CHLORIDE 0.5% VINYL CHLORIDE 2% ARGON 2% CARBON MONOXIDE 2% NITROGEN 3% METHANE 4% CARBON DIOXIDE BALANCE ETHYLENE SIZE 350 LP CERTIFIED HYDROCARBON CGA 510 AXIALL PROVIDE 2 COPIES OF COA W/ CYLINDER REPORT TAG# ON COA/LABEL CUSTOM MIX