The Flammenwerfer 41 (FmW 41) was modified version from the older Flammenwerfer 35, making it lighter (Flammenwerfer 35 weighed 35.8 kg, Flammenwerfer 41 - 22 kg). The oil stock was a 7 liter tank, and ignition was via a small hydrogen torch which acted as a pilot light. In the cold regions of the eastern front, however, the flame produced by this torch became so small it would routinely fail to ignite the fuel. Copying the Soviet method of using ignition blanks on their ROKS flamethrowers, the Germans produced the Flammenwerfer mit Strahlpatrone 41. This 18 kg version replaced the hydrogen pilot torch with a magazine with 10 ignition cartridges. Here too the flame oil reserve was 7 liters, the range was 30 m. It became the standard flamethrower of the Wehrmacht, but it was also exported or handed over to civilian departments such as police and fire brigade.