10 troy ounce of fine .999 pure Zinc! All Zinc has been tested to be at or above .9999 ( four nines ) in purity. This is a purely hand poured bar. It has a makers mark and is marked "10 TROY OUNCE" to show weight and ".999 ZINC" show purity and metal. All bars are double weighed with a high precision scale and each will average between 10.000 - 10.100 Troy Ounces.