Vaupan Digit Standard Abacus Soroban Professional 17 Column (10.2 inch) Math Abacus, Math Calculating Tool with Reset Button for Adults Kids(Brown)
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【High-quality materials】This 17-digit professional soroban abacus is made from quality ABS plastic, Shiny smooth beads durable and sturdy, measures
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Digit Standard Abacus 10.5 - Professional 17 Column Soroban
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Digit Standard Abacus 10.5 - Professional 17 Column Soroban
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WTNC 13 Digital Abacus with Reset Button for Students