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About product and suppliers:
        Alibaba.com offers 7,438 a4 portfolio folder products. About 85% of these are file folder, 5% are notebooks, and 1% are other hotel & restaurant supplies. 

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

There are 7,369 a4 portfolio folder suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Vietnam, which supply 89%, 8%, 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 1,013 with ISO9001, 943 with Other, and 151 with BSCI certification.