Isopro Canister Fuel 4 Oz Fuel Mixes: Primus Power Gas (25% isobutane, 50% butane, 25% propane), Primus Propane (100% propane), Coleman Outlander (70% butane, 30% propane), Coleman Propane (100% propane), Optimus Energy (25% isobutane, 50% butane, 25% propane), Burton Max Butane (100% butane), Burton Max Fuel Blend (80% butane, 20% propane), Olicamp Rocket Fuel (75% isobutane, 25% propane) Butane Stove Fuel 8 oz: Includes a collar notch on top of the canister that provides easy alignment in appliances. Powerfuel contains 1 liter of naphtha (chemically clean gasoline / petrol) with added corrosion protection.