... from customer Book Printing specificationItemBook PrintingMaterialpaperMaterials of Book Printingwood paper,Art paper,coated paper,cardboard and so on.outer cover157/250gsm ... .specification:1.size: your requirement.2.Material: wood paper,Art paper,coated paper,cardboard and so on.3:outer cover ... :157/250gsm art paper or your request. inner text:80GSM writing paper ...