Exercise book 1.Size:A4(210x297mm) 2.Cover material:white board 3.Inner page:60g offset paper Exercise notebook1.Binding style:Stapled binding2.Cover material:250g white board 3.Size: A4(210x297mm)4.Inner page:80sheets5.Inner page material:60g offset paper6.Inner printing:1color printing7.Package: 6pcs/shrink, 72pcs/ctnPS:55g/60/70/80g offset paper with 40/60/80/100/150sheets +different inside ...