The abacuses are made of plastic material, which has . They are great for rapid calculation. These are abacuses, which is highly recommended for use in any math abacuses course, and they can be used as nice tools for kids' early math education. Features - Color: Green, Brown. - Material: Plastic. - Size: About 23.40X6.50X1.50cm/9.20X2.55X0.59inch. - The abacuses are excellent calculation tools for enlightenment mathematics which can cultivate and improve children's computing power, memory and attention. - Made of , not easy to deform or break, can be used for a long period. - workmanship, portable and for office, school using. - Traditional Chinese abacus design, making them nice decors and also practical to use. - They aim to train children in abacus calculation and improve their calculation ability. Package list: 2 x Abacuses