... paper binder, hardcover, softcover book; children book, catalog, magazine, paper bag, paper box, calendar, folder, envelope, paper card, poster etc. 3 ... Heidelberg etc.7. Customized require and OEM is welcome. Item: 2013 new style 3 rings paper file folder 1. Minimum Order Quantity: 500 ... printing and package, etc. Our customer are around the world. 2013 new style 3 rings paper file folder