2 D ring binder 1)Binder cover with 2,3,4 ring binders 2)Material: 2MM chipboard coating with paper 3)Printing: Four-color paper binderD ring binder1)Binder cover with 2,3,4 O-D ring binders2)Material: 2MM ,2.25MM,2.5MM grayboard coating with paper 3)Printing: Four-color, covered with clear film 4)various sizes, materials and designs are available 5)OEM orders are accepted