... Ring shape:O/D-shaped OEM/ODM:Accepted A4 pocket 7 ring binder Breakthrough traditional style, high quality and ... products such as expanding file, file folder, file holder, file pocket, file case, file wallet, clip file, display book, ... of PULigh; strong toughness, make it corresponding good permeability;Waterproof, not easy to expand, deformation; environmentally friendly.Plasticizer to ...