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About product and suppliers:
        Alibaba.com offers 475 cardboard portfolio products. About 53% of these are file folder. 

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

There are 394 cardboard portfolio suppliers, mainly located in Asia. The top supplying countries or regions are China, India, and Hong Kong S.A.R., which supply 96%, 1%, and 1% of cardboard portfolio respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 72 with ISO9001, 45 with Other, and 18 with FSC certification.