General descriptionThese metallic blue mailing bags are manufactured from heavy-duty polythene, providing a robust solution for shipping. They are designed to make your goods stand out while being economical to purchase.Technical specificationsDimensions: Length: 16" (405mm), Opening: 12" (305mm)Thickness: 55 muOpacity: 100% opaque (black from the inside)Seal: Permanent seal with a 40mm lip