1. Material: film-HDPE 3 layers 2. There are outside white and inside black express bags. 3. Customers' printed designs or logo available. 4. Application: for promotion, packing, shopping, garment, and so on. 5. Moisture resistance, static resistance, shock resistance, load endurance and strong. 6. The use of destructive strong adhesive can ensure the security and confidentiality of the products inside the postal bag, and during delivery, a documentary protecting bag with nice crafts craftsmanship and finely printed with multiple color is attached. 7. Can be reused. Specification Item No.Usable SizePM#16*9+1.77"PM#27.5*10.5+1.77"PM#39*12+1.77"PM#410*13+1.77"PM#512*15+1.77"PM#614*17+1.77"PM#714.5*19+1.77"PM#819*24+1.77"PM#924*24+1.77"