20 Arithmetic bead string
Arithmetic Bead String (approx. 45 cm) with 20 balls, which are threaded in steps of 5 on a tear-resistant, stretchable cord. The balls are made of RE-Plastic® and have a diameter of 10 mm. When the string is pulled, the light ball lock is released and all the beads slip back together.
Since the balls have the exact diameter of 1 cm, they are also suitable for calculating and measuring.
Packed in a RE-Plastic®-bag.
dimensions: 15 x 10 x 1cm
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