Opus One International Ltd. Is a manufacturer of stationery and filing products, with headquarters and showroom in Hong Kong and manufacturing operations in China. Currently producing filing stationery on OEM basis.We can offer a wide range of filing products, including:Various Kinds of Lever Arch Files, e. G. Marble, PVCManila Folders with and without FastenersSuspension FilesExpanding WalletsPolypropylene Filing Products, e. G. Clearbooks, CopysafePVC BindersWriting Pads and NotebooksPaper Indices and DividersPhoto Album