Yes...if you look in the table he lists 12oz = 32cc = 384g of gold = 53g of aluminium... not a lot of use really...

An A5 crucible is 0.9l to the top, but usable capacity is 0.75l = 2kg aluminium, A6 is 1.2l to the top, usuable is 1l = 2.7kg of aluminium. Actually I can get an A6 in my furnace.

I'll leave as an exercise to the reader to work out why a crucible spec'd as '1kg' size is meaningless info....