Coleman - Propane fuel 465g, thanks to physical properties of Propane, every last gram of gas in the cylinder is used to operate stoves, lanterns or heater. It is also a cleaner combusting fuel, producing less carbon dioxide and as a result, less pollution. The gas can also be used for Gas Blowback airsoft guns, replacing green gas in colder weather. Pure propane gas typically has a higher pressure compared to Airsoft Green Gas, so this typically means your weapon will see an improvement on its FPS! We reccomend that when used in conjunction with Airsoft Gas Blowback pistols and rifles that you maintain you lubricate your weapon on a regular basis to keep O-rings and seals moist.