Vintage-Style 13 Rods Wooden Abacus Soroban Chinese Japanese Calculator Counting Tool w/ Reset Button 9.75" Material: Wood (Frame), Painted Plastic (Beads) Beads Number: 5 Beads Per Row x 13 Rows With Reset Button 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 L9.75" x W3" x D0.75" (24.8cm x 7.6cm x 1.5cm)