... material packing as the customers'requirements Chipboard folder:Specifications:1.Size: legal size(A4),Letter size(FC size),8.5''*11 ... ,2.5mm,3.0mm thickness chipboard3.Ring binder shape: D ,O with booster or not , or with 2pcs,3pcs,4pcs etc.4.Spine ... it is in the 50 strongest exporting companies with exporing total value and ratal in Anhui Province .Welcome your order! chipbard folder with ring binder