Bruntane is fitted with a standard thread Lindal leak-proof valve which means it will screw onto most stoves and lanterns and is the safest design available. Our 8 ounce canisters feature our patented Gas Gauge, so you know just how much fuel remains in each can before you pack it. Efficient and powerful, this high performance mix contains 80% isobutane and 20% propane. This item cannot ship via AIR. Please note that Bruntane fuel may ship in separate packaging from the rest of your order, may not be shipped via air, and may incur additional shipping costs.