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About product and suppliers:
        Alibaba.com offers 7,153 a4 portfolio folder products. About 86% of these are file folder. 

A wide variety of a4 portfolio folder options are available to you, such as document bag, presentation folder, and ring binder. You can also choose from leather, pu, and pp. As well as from folder, bag, and case. And whether a4 portfolio folder is free samples, or paid samples. 

There are 7,174 a4 portfolio folder suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 89%, 9%, and 1% of a4 portfolio folder respectively. 

A4 portfolio folder products are most popular in North America, Western Europe, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 988 with ISO9001, 955 with Other, and 95 with BSCI certification.