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About product and suppliers:
        Alibaba.com offers 7,219 a4 portfolio folder products. About 85% of these are file folder, 5% are notebooks, and 1% are specialty paper. 

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

There are 7,220 a4 portfolio folder suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 88%, 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 1,052 with ISO9001, 932 with Other, and 95 with BSCI certification.