MULTIPLE USE: The corrugated mailer boxes, multi pack, suitable for small business, retailers, packing, storing or shipping small items. WHY BLACK COLOR: Black, giving a mysterious surprise. At the same time, if accidentally scratched when folding, not easy to show scratches. QUICK ASSEMBLE: No tape, glue, staples needed, can be folded in seconds. RECYCLABLE MATERIAL: ECT-32 grade. The shipping boxes are made of recyclable corrugated cardboard. PACKAGE: The boxes come in multi pack of the same size, each one unfolded and packed in a large carton.