The product is 1 troy oz. of USA Sterling Silver 925 casting grains, suitable for lost wax jewelry making. These grains are high-quality, producing bright white castings, and are made of pure sterling silver. The product is from the United States and includes 1 oz. of casting grains for jewelry creation. The brand Ace Usa ensures quality and reliability for jewelry designers and craftsmen looking to achieve precise and stunning results in their casting projects.