The 15 rods 7 beads children's abacus is an essential tool for young learners to grasp of arithmetic. This abacus, designed specifically for educational purposes, allows children to visualize and physically manipulate numbers, making math concepts more tangible. Features -Color:Black -Material:Plastic -Size:27.00X11.00X2.00cm/10.61X4.32X0.79in -Quick reset function: the abacus features a onekey reset function, making it extremely convenient and quick to use, especially for young learners -15 rods 7 beads design: with its 15 rods and 7 beads per rod, this abacus is designed for children, helping them grasp basic arithmetic concepts - mental arithmetic tool: this abacus is specifically designed for mental arithmetic, aiding in the development of children's calculation skills and cognitive abilities -Durable craftsmanship: made with precision and plastic materials, this abacus is durable and reliable, ensuring longterm use and consistent performance -Easy to learn: the simple and intuitive design makes it easy for beginners to learn and use, making it an ideal educational tool for young students Package list: 4 x abacus