Legend Mining has all the sizes of the crucibles they sell. You have to be careful, some companies go by different standards. Budget Casting Supply has A10 crucibles and hold 10# of Aluminum. Legend's #10 holds 10 Kilos of copper. ??? I've done the math but don't have it right now, but the size is similar. I just go by dimensions. I've got a #8 from Legend, it says 7 kilos of copper, and I have 3 #10 I just got. I haven't got to use them yet The #10 is 5 3/4" dia. X 7 1/2" Tall outside dimensions.
Legend's crucibles are listed under assay supplies, Graphite crucibles, and Budget Graphite.
I also have the K size Clay crucibles that I have used for Aluminum. I think they are about 5" dia. and 7" tall. They are pretty good for a small crucible, and only around $8 US.
www.lmine.com/
www.budgetcastingsupply.com/
