Vintage-Style 13 Digits Rods Wooden Abacus Soroban Chinese Calculator Counting Tool 11" 13 digit professional abacus with wooden frame Beads Number: 7 Beads Per Row x 13 Rows Measures L11" x W4.5" x D0.75" (28cm x 11.5cm x 1.5cm) Both practical and educational. (Instruction not included) Stock in the US! Fast Shipping !