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About product and suppliers:
        Alibaba.com offers 133 hb graphite pencil core products. such as free samples. 

There are 133 hb graphite pencil core suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and United States, which supply 96%, 1%, and 1% of hb graphite pencil core respectively. 

Hb graphite pencil core products are most popular in Western Europe, Northern Europe, and Central America. 

You can ensure product safety by selecting from certified suppliers, including 20 with ISO9001, 8 with FSC, and 8 with Other certification.