Fits small 1/4, 3/8, 5/16 copper, forget anything larger than 1/2. It just doesn't get hot enough for me. I try increasing the amount of fuel and oxygen a bit and taxiing with a neutral flame, but the flame tends to pull away from the end and not stay in place. It seems to work best as a reducing flame, despite being very small and not very hot. I'll keep it in the set but use my number 3 for anything larger than 1/2 (which is typical for me). Good luck soldering 3/4 or 7/8. Maybe I caught a broken tip?
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