... Commodity: Exercise book.Size: 16x20cmQu'ty: 400,000pcs.Description: Cover: 157gsm art paper, 4c+0c printing.Inner paper: 55gsm offset paper, 20sheets ... USD0.059.Remark: If the cover is 210gsm ,inner paper is 20sheets, the price is $0.063. If ... the cover is 210gsm, inner paper is 18sheets, the price is $0.058. If ... the cover is 157gsm, inner paper is 18sheets, the price is $0.054.If ...