Trangia winter attachment for all Trangia 27 series and 25 series cook-sets. In severe cold, a winter attachment can be very useful. The pre-Heater Is attached to the bottom of the spirit-burner, placed on the heat-reflector, filled with fuel and lit. The pre-heater warms the spirit-burner, while the heat-reflector focuses stray heat-radiation back towards the spirit-burner. It also keeps the snow away from the burner! Nr 500021 Winter attachment. Spirit burner with pre-heating cup and aluminiu