13 Rows Design: Ancient Calculator Counting Collection for Children Adult Wooden Material: Wooden Abacus Chinese Calculator is made of high quality wooden material, very durable,polished surface Exquisite Workmanship: Retro metal sheet wrapped corners and edges, exquisite, classical and elegant Classic Chinese Design: two beads on each rod in the upper deck and five beads each in the bottom, The beads are usually rounded and made of a polished artificial stone beads Calculation Tool: Arithmetic Abacus for school elementary math teaching aids and Kids addition and subtraction counting Specification: Material: wood Size Chart: 28x12x2cm/11.02x4.72x0.79inch Package Includes: 2 Piece Abacus Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!