If you own a Trangia, get a pack of these. If you are ordering a new stove, get a pack of these and have them shipped together. If you have an old military surplus trangia that leaks, get a pack of these. I have a buddy that had a military surplus stove that was abused (most all surplus ones are) and it leaked when carried with fuel in it. The stove still worked, and that was my first introduction
This review was written in the old system and had content requirements that are different than reviews written today.