The Trangia Gas Burner FMS-127 accessory allows you to convert Trangia spirit cookers (27 and 25 models) to gas, for ease of use, greater fuel efficiency and flame control. This burner fits right onto the lower windshield of the 25 and 27 stoves in place of the traditional spirit burner. If you want to add the option of fuel versatility to your existing Trangia Stove, then the Gas Burner is what you need. Trangia stove systems are one of the world's most popular and widely available camp cooking hardware.