The marbles are about an half an inch. I put them in with a metal forcep that, on the end, is curved on either end so you can completely wrap it around a circular object. The metal is almost always room temperature. I melt the little bit from the punty off by holding the marble with this forcep trying to only keep the glass in the fire and not the forcep. After I do that I let it cool for a few seconds and then put it into the pot.
After reading everything I will try and heat the forcep up some prior to picking up the marble. Maybe that will help.
I only know it is COE 104. I can't remember exactly where I got them as I bought a bunch awhile ago from a couple different companies.
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