Description The 17 digits abacus, also called a counting frame, is a calculating tool where beads are moved up and down and by feeling and looking at the beads, complex calculations are made. Calculations made by the abacus /soroban is a integration of mind. Abacus /soroban is a tool to make brain smarter. Features - Color: as shown in the pictures. - Material: hard plastic (frame and beads), and wood (rods). - Size (L*W*H): about 10.5*2.3*0.7 inch. - and Plastic Abacus Arithmetic Soroban Kid's Calculating Tool 17 Digits. - Soroban style abacus, plastic frame, 17 digits. - One bead above and four beads below. - Give concrete visible display of numbers by beads. - A very useful tool in general mathematics education. - Widely used by kids, accounting students, merchants, traders, etc. Material: hard plastic (frame and beads), and wood (rods). Size (L*W*H): about 10.5*2.3*0.7 inch. Soroban style abacus, plastic frame, 17 digits. One bead above and four beads below.Give concrete visible display of numbers by beads. A very useful tool in general mathematics education. Widely used by kids, accounting students, merchants, traders, etc.