Express butane is specially manufactured for multi-directional use, preventing flare-ups, flame-outs, and jet blocking. Its regular flow rate remains unaffected regardless of the operating angle. Suitable for all seasons with a gas cartridge of Propene (26%) + butane + propane mix. Net gas mass: 60 g/110 ml with a standard screw valve of 7/16” (28 threads per inch) (EN417).