Mounted on attractively finished wooden base 20 beads per wire Unit is 13.5"x9.5"x4" Weighs just over 2.5 lbs. Ideal for childhood education For centuries this simple device has been employed as a learning and counting tool around the world, and there is a reason it hasn't died with advancing technology; find out why as you see the benefits of visual and hands-on practice of math for the developing mind. Blurring the line between toy and tool, the ELabs Abacus is the perfect way to introduce mathematics to young learners.