Wooden brown abacus, approximately 40cm long, perfect for calculations. - Type: Abacus - Color: Brown - Material: Wood - Size: Approximately 40cm long Thank you for viewing. This is a so-called long abacus (wooden, 27 digits). It was used in an abacus school and at school, and has been stored at home for a long time. The beads slide perfectly without any problems. Instant purchase is welcome.