The Coleman C500 Performance cartridge holds 440 g of a 70/30 butane/propane mix, giving a steady, consistent burn in a wider range of temperatures than butane alone and a long runtime for longer trips. It uses a standard EN417 screw thread and Coleman's double-safety-seal resealable valve, so it can be connected and disconnected safely even when not empty. Use it with Coleman F1-range stoves and lamps, the FyreLite and FyreStorm stoves and other EN417 screw-thread appliances. Total weight is about 598 g. Store in a cool, ventilated place away from flames and direct sun. Never pierce or burn the cartridge, even when it is empty.