This solid copper density cube features a top hook and is stamped with its element symbol (Cu) for easy identification. The cube measures 20 mm (0.78 inches) on each side, and including the hook, it stands 1.5 inches tall. The hook allows the cube to be easily lifted from water and massed using a spring scale (not included). Density cubes in this series have a mass range between 50 and 400 grams, making a 5.0 to 1.0 Newton spring scale suitable for weighing. This cube is designed for educational applications including density investigation, specific heat, and specific gravity exploration. Due to the nature of raw metals, some oxidation or corrosion from humidity and storage may occur; any oxidation can be scuffed off. These cubes are designed for educational settings and are not fabricated with ultra-high-precision machining. Tolerances fall within the plus or minus 5 percent range of stated dimensions, though they are generally tighter.