Micro-Flame Butane Torch Soldering Jewelry Hobbies Self Igniting SFC Tools14-300 Itruns on butane, is refillable,has automatic ignition, and is portable and lightweight. Can be used for soldering jewelry metals, firing PMC clay, and enameling. Ithas a2500?F flameand up to 90 minutes of continuous burn time. Measures 5.5 x 4.0 x 2.0 (14 x 10.5 x 5 cm).