Wowlife 13 Rods Wooden Abacus Chinese Calculator Counting Tool Vintage-Style 13 Digits Rods Wooden Abacus Soroban Chinese Calculator Counting Tool 11" Material: Wood (Frame), Painted Plastic (Beads), Made of high quality wooden material, non-toxic and very durable Frame Size: 29*11cm/ 11.42*4.33 inch, Beads Number: 7 Beads Per Row x 13 Rows Conducive to cultivate and improve children's computing power, memory and attention Both practical and educational (Instruction not included)