To aid in learning place value, number concepts, operations, measurement, fractions, decimals, percents, and volume. ?This magnetic Base Ten set is ideal for use with magnetic boards! Pieces are made from 19mm thick foam which makes them extremely durable for class use. Set includes 100 unit cubes, 10 rods, 10 flats and 1 thousands cube. Thousands cube measures 26cm x 26cm.