There is an upgrade for people whoalready have the gas version of the328196 Gravity III™, but would alsolike the option of using liquid fuel,including naphtha fuel and leadfreepetrol, and even kerosene inemergencies. The kit has a 0.6-litrefuel bottle, ErgoPump, a multi-toolwith a cleaning needle, fuel cup andjet nipples. A practical storage bagis included.