Abacus 13 Rod Multicolor Kit Japanese Soroban Calculator for Visual Math Aid Learning

13 bamboo rods,with 1 bead above and 4 beads below on each rod Traditional arithmetic abacus,a classic tool that is still fully functional A nice tool for kids' early mathematic education Can be used as classical calculator in office, education tool for teacher or a gift for abacus collectors Digit number:13 Material:Plastic frame and beads,bamboo rods Color:Black frame,multicolor white,blue,red,yellow and green beads Size (L x W x H):Approx.L 20.5cm * W 6.2cm * H 1.5 cm Weight:110g