| The material for rubber foam or EVA foaming. It has the high elastic and high stop slippery nature. |
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| specifications︰ | Usually for 6-7 mm diameter. Color specification, etc, can be customized.
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| Advantages︰ | High elastic and stop slippery nature. For grinding surface sand surface, appear relatively high-grade. Suitable for women and children with the pen. It can better protect the finger can not cocoon or hurt.
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