Features: Brand Classic wooden abacus. This traditional wooden abacus is designed for traders, accountants, clerks, students, and teachers, or makes a great gift for abacus enthusiasts. For creative math learning. Use this math tool to support number bonds and counting skills. A vintage-style abacus with wooden beads ideal for students, teens, learners, math lessons, and classroom use. Portable and durable design. This classic abacus features 13, 15, or 17 rows with 5 beads per row. Constructed with a sturdy ABS frame and wooden beads. Lightweight, waterproof, and long-lasting. Traditional counting aid. This abacus serves as an educational tool that helps develop practical math abilities in toddlers and children, stimulates brain activity, supports intelligence development, and assists older students in learning mental calculation. Smooth finish. High-quality craftsmanship with a finely polished frame and smooth surface free of burrs for comfortable handling. Specifications: Material: Wood, metal, rubber Type: 13-row & red beads; 13-row & black coffee; 13-row & white cream-colored; 15-row & black red; 17-row & red cream-colored; 17-row & white; 17-row & black coffee; 17-row & black red Small size: Approx. 24.5x7.5x2in / 9.65x2.95x0.79cm Medium size: Approx. 34.6x8.6x2.1in / 13.62x3.39x0.83cm Large size: Approx. 38.6x9.2x2.1in / 15.2x3.62x0.83cm Weight: Approx. 241g Note: 1. Please allow 0–1 cm error due to manual measurement. Ensure you are comfortable with this before purchasing. 2. Due to differences in monitor displays, the image may not reflect the actual color of the item. Package includes: 1 piece portable wooden abacus