<ul><li>East Abacus - Soroban. Very popular.</li><li>Current standard type</li><li>birch ball, ebony frame / 130.62.5 (inch) / 5.7 (oz) / Japan Import</li><li>1 ball (having a value of five) and 4 balls (having a value of one)</li></ul><br><br>Made with the best materials and traditional techniques, this standard is widely used in school and workplace.<br>It is very easy to use and can be used for a long time.<br>The top frame has a triangular ruler, making it convenient for drawing lines.

Standard Soroban (Abacus) / 23 Digits [43300]