Policy: Please feel free to contact us, any problem will be solved in the best possible way Reset button: Soroban's reset button is very convenient to use. When you have finished processing a record and move on to the next record, carefully press the reset button to return to the original state Perfect finish: Soroban's frame is polished and round without burrs, so you can use it comfortably Increased intelligence: The use of the attack increases the practical ability of the child and stimulates the activity of b cells, which improves the level of intelligence of the child Material and size: The Soroban consists of 13 types and 5 beads. It consists of a plastic frame, beads and bamboo stakes. Its size is 24.6 x 7 x 1.8 cm. Product Soroban style chart ideal for quick calculations. -This abacus is wrapped in a sturdy plastic frame and fitted with bamboo sticks. -It is a user-friendly abacus / soroban recommended for use in any math soroban course. Features: er of digits: 13. Material: plastic frame and balls, bamboo sticks. Size (L x W x H): approx 25 x 7.5 x 2 cm. Scope of delivery: 1 x abacus with 13 bars.