... .5mm, 3mm gray board coated with paper,cloth & leather or art paper of 128gsm, 157gsm. For ends: 120gsm, 140gsm, 150gsm ... or fancy paper.For text: 105gsm, 128gsm, 157gsm, 200gsm, 250gsm art paper; 70gsm, 80gsm, 100gsm, 120gsm, 140gsm offset paper.Printing:CMYK ... :Double Wall Corrugated Carton for Exporting and craft paper warpped inside, size per your book specifications. MOQ:1000pcs per title. ...