Flexzion Plastic Abacus Arithmetic Soroban Kid's Calculating Tool 17 Digits Rods 5-Beads Wood Plastic Oriental Counting Calculator Portable Soroban style abacus, plastic frame, 17 digits One bead above and four beads below with reset button. Give concrete visible display of numbers by beads Non marring anti-skid rubber feet on the base of the abacus keeps your abacus from sliding around A very useful tool in general mathematics education. Both practical and educational Widely used by kids, accounting students, merchants, traders, etc