0.39" Erbium Cube Er 99.9% Lanthnoid Rare Earth 10mm Density Cube for Element Collection Periodic Table Hunter

Key features

• 0.39" density cube for element collections, standard 10mm size and density, exactly the density weight.
• Brushed surfaces, beautiful looks with double face laser engraved element information.
• Lab grade high purity material, almost the best purity you can get in market.