17 Digits Rods Soroban Standard Abacus Chinese Japanese Calculator Counting Tool Math Learning Beginners| Features: It is a calculating tool that was used for centuries before the adoption of the written modern numeral system. The abacus is still widely used by merchants, traders and clerks in certain parts of the world such as Asia and Africa. In addition to being a professional tool, the soroban or abacus is also an educational tool. Widely used in teaching children counting and mathematics. People who become proficient in the use of the abacus almost automatically become adept at mental calculation. Its classical, standard design allows for its ease of use as a professional and educational tool. Soroban Abacus only, other accessories demo in the picture is not included. Specification: Item Type: Soroban Abacus Material: Metal Dimensions: 34*7.5*1.5CM Quantity: 1 Pc Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you