Policy: Please feel free to contact us, any problems will be solved in the best way. Reset Button: The soroban's reset button is very convenient to use. When you are finished processing one entry and moving on to the next, gently press the reset button to return to the original state. Perfect Finish: The soroban's frame is polished and rounded without burrs, so you can use it comfortably. Increased Intelligence: Using the abacus increases a child's practical ability and stimulates the activity of brain cells, thereby improving a child's intelligence level. Material and Size: The soroban consists of 13 columns and 5 beads. It consists of a plastic frame, beads, and bamboo poles. Its size is 24.6 x 7 x 1.8 cm. Product Description: Soroban style abacus ideal for rapid calculations. -This abacus is encased in a sturdy plastic frame and fitted with bamboo sticks. -It is a user-friendly abacus / soroban recommended for use in any math soroban courses. Features: Number of digits: 13. Material: plastic frame and beads, bamboo sticks. Size (L x W x H): approx. 25 x 7.5 x 2 cm. Scope of delivery: 1 x abacus with 13 rods. (zhongchengdaye)