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)