Policy: Please contact us, all issues will be resolved in the best possible way. Reset button: Soroban reset button is very convenient to use. When you're done processing a post and moving on to the next one, press the reset button gently to return to the original state. Perfect finish: Soroban frame is polished and round without edges, allowing comfortable use. Enhanced intelligence: Using the abacus improves children's practical skills and stimulates brain cell activity, enhancing children's intelligence level. Material and size: Soroban consists of 13 beads and 5 rods. It is made of a plastic frame, beads and bamboo rods. Its size is 24.6 x 7 x 1.8 cm. Product description Soroban style chart ideal for quick calculations. - This bead frame is embedded in a sturdy plastic frame and equipped with bamboo rods. - It is a user-friendly bead frame / soroban recommended for use in all math soroban courses. Features: Number of digits: 13. Material: Plastic frame and beads, bamboo rods. Size (L x B x H): approximately 25 x 7.5 x 2 cm. Leverage scope: 1 x abacus with 13 rods.