Sealike New Arrival Portable 13 Column Abacus Arithmetic Soroban School Math Learning Tool with a Stylus Go to amazon.com Related posts Expert choice for soroban 13 Feature13 Column AbacusGreat for rapid calculationvery useful tool in general mathematics educationWidely used by kids, accounting students, merchants, traders, etcPackage include:1* Abacus with a Stylus DescriptionPackage include:1* Abacus with a Stylus!!!