XIKAR PUROFINE butane is the recommended butane for all your XIKAR lighters, with near zero impurities it won't cause clogged burner valves or misfires. Jet flame lighters require the highest quality butane. Purofine's low level of impurities (less than 15 parts per million!) help keep your lighter functioning properly for years of use. 8 oz (400 ml) can.