Umarex Elite Force "Fuel" Green Gas airsoft rifle fuel features high power output. It is 10 percent stronger than traditional green gas. The green gas has an added silicone base for added lubrication of airsoft guns. It features an integrated safety valve so that when the pressure exceeds safety level due to temperature or other reasons, the valve will relase the gas automatically to reduce explosion risk. One can will allow for 40-60 recharges on an average airsoft gas magazine to shoot 1200-3000 rounds per can.