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About product and suppliers:
        Alibaba.com offers 29 dsi pen products. About 6% of these are ballpoint pens. 

A wide variety of dsi pen options are available to you, such as no, yes. You can also choose from free samples. 

There are 29 dsi pen suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of dsi pen respectively. 

Dsi pen products are most popular in North America, Western Europe, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 2 with Other certification.