"Package includes: there are 20 pieces of transparent file folders with 10mm sliding bar in this set, enough for you to collect and classify different documents.^Plastic report cover featured transparent PP material, high transparency, can clearly see the documents, data, easy to find the required documents and information.^Report covers size: this set of report cover length is approx.A4 paper and US letter size(11 x 8.5 in); The plastic cover thickness is 0.18mm(18C). It feels soft to turn the cover.^These report covers have solid 10mm Sliding Bar, exquisite and durable.^Wide uses: this folder can be done as tax folders, sheet music folder, homework folder, presentation folders, also can be used for schools, enterprises and individuals on display, etc. Businessmen can use them to hold documents or files, and students can use them to hold test papers."