Pure 99.99 Zinc Fun to play with and melt Each pcs weights about 12 grams each Each piece is about 0.31" thick and in length with a diagonal of 0.67". These have a denser pattern and molecule arrangement as they are first cast into a rolled plate then stampped out. These are great for easy weighing out of more precise measurements Each piece weights about .028-.03 pounds Atomic Number = 30 Melting Point (F) = 787.15 Atomic Mass= 65.32 Boiling Point (F) = 1665 Density (g/cm3) = 7.14 Chemical Composition Zinc 99.995% Lead 0.003% Max Cadmium 0.003% Max Iron 0.002% Max Tin 0.001% Max Copper 0.001% Max Aluminum 0.001% Max Total Impurities <0.005%