Features:Made of high quality cardboard, the mailing box features a thick three-layer corrugated paper construction to provide better stability and firmness. Strong and yet lightweight, our mailing box will also ensure that your shipping charges are within reasonable limits.High quality cardboardE-Flute grade middle layer.Strong and lightweightCrush-resistant structureThickened three-layer corrugated boardDie-cut foldingInterlocking designPack: 100 PackSize :220x160x77