East Abacus - Soroban. Very popular.
Current standard type
birch ball, ebony frame / 130.62.5 (inch) / 5.7 (oz) / Japan Import
1 ball (having a value of five) and 4 balls (having a value of one)

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2.83 inch
Height : 0.79 inch
Length : 13.54 inch

Item Weight: 4.96 ounce (View shipping rates and policies)
Shipping Weight: 4.96 ounce (View shipping rates and policies)

ASIN : B001MTHZ88