Refill gas cartridges are necessary for the continued use of gas burners such as Bunsen burners. The butane and butane/propane mixed cartridges come in various sizes to fit any equipment required. Compatible with products that require gas canisters to be routinely swapped out, the fuel sources power small grills, Bunsen burners, heaters, and blowtorches. Gas cartridges are sealed for maximum safety and against atmospheric leaking.