Rothenberger Map/Pro Gas Cylinder 400g provides a hotter flame than propane. This is ideal for brazing and silver soldering pipe work as it gives the optimum burning performance at 2300°C and a shorter working time. It eliminates the need for an oxy-fuel or oxyacetylene 2 bottle set up. It is compatible with the Rothenberger 1” torch range such as the SuperFire 2 and QuickFire. It encourages a longer life of the torch it is being used with.