Nano 99.9% purity B4C boron carbide 200nm / 300nm / 400nm hardness metal alloy abrasive materia

Nano 99.9% purity B4C boron carbide 200nm / 300nm / 400nm hardness metal alloy abrasive materia
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sku: 1005005467339190
$55.00+4%
$57.00
Shipping from: China
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