Yellow Mountain Imports Vintage Style Wooden Abacus (13.75 in) - Professional 17 Column Soroban Calculator with Reset Button Craftsmanship - Anti-Skid Rubber Feet Professional Reliability Goes Back Centuries: This classic abacus/ soroban calculator is the abacus in classical form, featuring the system used before modern numerals that is still used in parts of the world by merchants, traders, and clerks. A Great Educational Tool: When learning on the abacus, math practice can be more effective because you may remember more. This makes using an abacus for kids math a great way to teach them how to count and equate, and is widely used this way. Beautifully Crafted Wooden Fame: Quality design has been taken to the next level with this soroban abacus with a crafted wooden frame, making it a decorative piece thats home friendly, featuring non-marring, anti-skid rubber feet! Features Modern Conveniences: This 17 digit professional soroban abacus comes with a handy reset button and is a sturdy wooden abacus set made to stay put, measuring in at 13.75 x 3.5 x 1 in (35 x 9 x 2.5 cm). 100% Satisfaction Guarantee: High quality craftsmanship is a non-negotiable for us. This abacus, professional, educational or decorative, will be flawless, or your money back.