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• PROFESSIONAL TOOL - The soroban or counting tray is an abacus developed in Japan. It is derived from the ancient Chinese abacus (suanpan) that was imported to Japan in the 14th century. The abacus 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.
• EDUCATIONAL TOOL - In addition to being a professional tool， the soroban or abacus is also an educational tool. The abacus is 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. Instructions are not included.
• QUALITY DESIGN - This soroban abacus has a beautifully well crafted wooden frame. The aesthetics of this soroban makes it worthy of being a decorative piece as well as a professional and educational tool.
• SPECIFICATIONS - This is a 17 digit professional soroban abacus with a reset button and non marring anti-skid rubber feet on the base that keeps this soroban from sliding around while in use. This soroban measures 13.75" x 3.5" x 1" (35cm x 9cm x 2.5cm).
• 100% SATISFACTION GUARANTEED – Here， at Yellow Mountain Imports， we want you to be satisfied with your purchase. You are backed by our 30 day no questions asked money back guarantee so you can buy with confidence.