CMAX|HGX® is a reliable fuel gas for cutting, heating and brazing that will performance higher performance than acetylene, at a much lower price. CMAX|HGX® is the new standard of economy, performance and safety for gases used in the metal working process. CMAX|HGX® is a superior high temperature, high heat content fuel gas with worldwide availability. A 100 lbs./50kg. cylinder of CMAX|HGX® Fuel Gas provides over 5 times the BTUs of a standard 5cu.m3 Acetylene cylinder, while costing less. Here is what it means to you.