This single solid brass density cube features an element stamp (Br) for easy identification and measures 20 mm on each side. Brass density cubes are commonly used in physics classrooms for density investigation, specific heat, and specific gravity exploration. Due to the nature of raw metals, some surface oxidation may occur during storage and can be removed by light scuffing. These cubes are designed for educational use with tolerances in the plus or minus 5% range of stated dimensions.