1.Paper board office folder 2.Ring Shape:O-Rings ,D-Rings 3. ... etc.7. Customized require and OEM is welcome. Item: Paper board office folder 1. Minimum Order Quantity: 500 Piece/Pieces .2 ... .5. Size: custom6. Spine: 1.5 inch, 2 inch or 3 inch and so on7. Cardboard: grey board, thickness: 1.6 mm ... and package, etc. Our customer are around the world. Paper board office folder