Tomoe Taban Abacus 23-Digit One-Touch ON800 Birch Ball

Features: A calculator that allows you to decrease the breadth with just a push of a button
Specifications: The beads are made of strong birch beads with an elegant look
Accessories: Hard case included
Size (W x H x D): 13.0 x 0.6 x 2.8 inches
(33.1 x 1.6 x 7 cm)
Weight: 6.3 oz
Material: Birch ball