The Hot Devil 5x Purified Butane Gas has been purified 5 times, to best remove the impurities contained within the gas. This Butane gas contains approximately 60% butane, 36% isobutane, 2% propane. There is a burning temperature of 1350ºC, with a universal connection and multiple adaptors included in the cap. The cylinder is disposable and contains 300ml/10 fl oz.