Math Practice Abacus with 13 Parallel Rods, Divided Upper and Lower Counter Positions, and Rectangular ABS Plastic Frame five colors

Features: Dedicated Practice Format: set of 13 aligned rods provides defined working area for completing abacus-based calculations. ABS Frame Construction: rectangular frame keeps bead rods together as organized practice tool. Clearly Divided Beads: upper bead and 4 lower beads on each rod make working positions easy to distinguish. Purpose-Built for Practice: 13-rod layout keeps working area centered on abacus-based math calculations. Included Item: package contains single 13-rod abacus for ready-to-use calculation practice setup. Specifications: Component: ABS Size: Approx.20.3X6.3X1.5Cm/7.99X2.48X0.59Inch Quantity: 1 Piece Package Includes: 1 Piece Abacus note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to differences between different monitors, picture may not reflect actual color of item.