Description: WOOD MATERIAL: Abacus is made of wood material, the edges are smooth and, for children to use and will not scratch hands. EASY TO USE: The beads easily, and the application is smooth and not stuck. EDUCATION: Use Wooden Abacus to teach your kids math like counting, addition, subtraction, multiplication, and division. 13 DIGITS RODS: 13 Digits Rods, 5 Beads Wood Counting Calculator with reset button. APPLICATION: Abacus is perfect for children, students, teachers, businessmen, traders, etc. Specification: Material: Wood Size Chart: 24.5x7.8x2cm/9.65x3.07x0.79inch Package Includes: 1x 13 Digit Abacus Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping! 5 Beads Wood Counting Calculator Math Learning Professional 13 Column Calculator Abacus Functional Educational Learning Tools