Premium fuel is the purest butane anywhere, Colibri requires you to use their fuel to keep your lighter under warranty, and we agree! Most fuels have a lot of contaminants which will clog your lighter, Colibri Premium butane does not!Fuel your life with Colibri. In this set of twelve cans of premium butane, each can holds 3.04 ounces of fuel. NO INTERNATIONAL SHIPPING AND NO EXPEDITED AIR SHIPMENTS AVAILABLE. Butane must be shipped using approved ground methods - We will not ship outside the contiguous US.