The Esbit 12 x 14g solid fuel cubes have a burn time of approximately 12 minutes and each box includes 12 cubes. They have a strong heat output, ignite with a match or lighter and lightweight and compact. When stored properly, Esbit solid fuel maintains its full functionality for many years. It works also at temperatures below 32 degrees F and in high altitudes. It is easy to handle and simple technique which cannot fail. It has no visible smoke and leaves almost no ash after burning. It is used by various NATO forces, expeditions, in disaster situations.