book cover,PP book cover 1.A4,A5, B5 size 2.Material:PP/PVC 0.2mm 3.for promotion&AD,school use 4. ... OEM Design, Test BY SGS PP book cover,PVC book cover, book cover, notebook cover ... ,plastic book cover Size A4,A5,B5,A3 MaterialPVC, PP,PET eco-friendly,thickness ...