Traditional arithmetic abacus, a classic instrument that is still fully functional13 bamboo sticks, with 1 bead up and down 4 beads on each rodGood made plastic frame and beadsA nice tool for early mathematical Children EducationCan as a classical computer in the office, educational tool are used for teachers or a gift for abacus collectorsSoroban abacus style, perfect fast calculation.This abacus is encased in a sturdy plastic frame and suspended with bamboo poles.It is a user-friendly abacus / soroban, strongly recommended for use in any math abacus / Abacus course.Size (L x W x H): 8 x 2.5 x 0.6 inchesMaterial: Plastic Frame and beads, bamboo sticksColor: black frame, colorful beadsPackage Content:3 x AbacusOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.