ULTRA PURE 420ML BLACK BUTANE CANS 12CT/BOXUltraPure extra purified butane lighter refill gas is the PUREST European butane in the market. It is manufactured in the United Kingdom and meets both ISO and TUV regulations.ULTRA PURE 420ML BLACK BUTANE CANS 12CT/BOX Features:12 cans of 420 ml Premium European GasNear zero impurities (99.995% pure ..