... Design(OEM). 2.Duplex boards,Multi color Printing. 3.Recyclable Material. 4.3 to 7 plys. Product Feature:1) Printing: ... cardboard + AE Strong corrugated boardsingle wall, double wall, 3-layers, 5-layers,or moreFlute sizesA/B/C/E/FNail ... outer cartonsQuality ControlFrom material purchase, pre-production machine testing, 3 times assessment for finished goods, packing etcSample chargeSample charge will ...