Interlocking Weight Cubes These multi-purpose 1cm/1g cubes are perfect for a variety of metric, mathematical, and scientific applications. Each cube displaces 1 cubic centimeter of water. Use them for pattern- and model-making, counting, sorting, teaching number value and measurement (volume, mass and linear). Large sets of cubes come in a plastic storage bucket. Ten colors. Perfect for counting, measuring, and patterning. Plastic 1 cm cubes in 10 colors, weighing 1 gram each.