The product is 1 Troy oz. of Rio Grande Sterling Silver 925 Casting Grains, suitable for lost wax jewelry casting. These casting grains are made of high-quality sterling silver and are designed to produce bright white castings. The grains are ideal for jewelry makers looking to create quality pieces with a smooth finish. Made in the United States, this product is a valuable addition to any jewelry design and repair workshop. 31 grams or 1 Troy oz Thank you for choosing Brysons Rock Shop we are happy to hold your box open for you to add more items and save money on shipping