This Coleman C500 Gas Cartridge is a resealable gas cartridge. It has a screw valve for use with camping stoves, gas lamps and lanterns, ideal for camping. It contains a propane/butane mix, for a steady and consistent burn across a wide range of temperatures. In addition, the cartridge can be disconnected and reconnected to your appliance in complete safety without leaks, due to the Coleman double safety seal valve. Compatible with all Coleman resealable appliances.