Ideal for making pure gold ingots for sale to the public. Graphite ingot molds produce much smoother, shinier ingots than conventional ingot molds. A single graphite block with 6 slots, our 5 oz. graphite ingot mold set can produce up to six 5 oz. ingots at the same time. Graphite ingot molds have a wear and oxidation factor, making their life expectancy significantly shorter than the virtually indestructible steel ingot molds. Capacity of each slot is 100 pennyweights or 5 troy ounces.