... 3.usage:packaging 4.OEM available 5.specification: small,medium,large MaterialArt paper(128G, 157G, 200G, 250G, 300G)Duplex board with grey ... back(250G, 300G, 350G,400G)Craft paper(100G, 120G, 150G, 200G, 250G, 300G)Corrugated paper( A, B, C , E grade )Color1 ...