Features: The 13 row rainbow abacus features color coded beads to enhancement visual learning and engagement, crafted from durability ABS matter for long lasting classroom or home math practice. Each lightweight frame contains smoothly rotating beads that maintain accurate calculations, with reinforced rods preventing wear from frequent student use. Designed for basic students aged 6 12 and homeschooling parents seeking interactive math teaching tools for foundational calculation skills. Perfect as a classroom counting tool for group activities or individual home study meetings to reinforce number concepts through hands on manipulation. This educational abacus combines math manipulatives with eye catching rainbow colors to simultaneously improve calculation accuracy and maintain children's enthusiasm for numerical learning. Specifications: Matter: ABS, with good durability and lightness. Size: Standard 13-stage design, suitable for children and beginners. Attributes: Attracts students' attention and increases learning fun. Practicality: Suitable for classroom exercises and homework, helping students improve their mental calculation skills and math skills. Size: 20.3x6.3cm Package Includes: 1PC bead mental abacus note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.