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 and body. Abacus /soroban is a magical tool to make brain smarter. Features - Color: as shown in the pictures.- Material: durable 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.Packing list: 1 * Portable Plastic Abacus Arithmetic Soroban Kid's Calculating Tool 17 Digits