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About product and suppliers:
        Alibaba.com offers 281 si pens products. About 14% of these are ballpoint pens, 1% are multi function pen, and 1% are gift sets. 

A wide variety of si pens options are available to you, such as metal, plastic, and wood. You can also choose from logo pen, multi-functional pen, and banner pen. As well as from yes, no. And whether si pens is feather, or animal. 

There are 281 si pens suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of si pens respectively. 

Si pens products are most popular in Domestic Market, North America, and South America. 

You can ensure product safety by selecting from certified suppliers, including 167 with ISO9001, 100 with ISO/TS16949, and 24 with ISO14001 certification.