Two quantity 5mm (.200”) carbon electrodes for $28.14 delivered.
Among other things, these are used for fusion welding with a stick welder. That is, when you want to stick weld something where no filler material is needed.
In my case, I will probably use these for “washing” weld beads using a stick welder.
Ideally, one would lay down a bead that does not need to be washed, but when you need more penetration, blending or getting a toe of the weld to tie in, a regular stick electrode will add more filler while fixing these problems.
5mm was the only size that I saw offered for sale, but I did not search all that much. It will be interesting to see what kind of an arc I get at varying amperages.