Duplex Grey Chip board Gray back and white back Substance: 450-2200gsm, Thickness 1~7mm Duplex Grey Chip board Gray back and white back Substance: 450-2200gsm, Thickness 1~7mm Duplex Grey Chip BoardMade of 100% recycled paper200 to 5,000gsm weightMax. length: 3,500mm Width: 2,300mmSuitable for notebook, cover, files, gift boxes