Vintage-Style 17 Digit Rods Wooden Abacus Soroban Chinese Japanese Calculator Counting Tool w/ Reset Button 14" 17 digit professional soroban style abacus with wooden frame and reset button. Beads Number: 5 Beads Per Row x 17 Rows Non marring anti-skid rubber feet on the base of the abacus keeps your abacus from sliding around. Both practical and educational. (Instruction not included) Measures Approx: 14" x 3.5" x 1" (35.5cm x 8.9cm x 2.5cm)