Practical inviolable seal, progressively numbered. The closure is reinforced with a metal insert for maximum security. Its slim body makes it very versatile and applicable from minimum holes of just 2.5 mm. Non-reusable, it is ideal for sealing packaging with sensitive contents, for identifying and recognizing any object such as trolley, fire extinguishers, security doors, clothing, safety boxes, emergency kits etc. It is suitable for multiple uses also in the transport sector. Other colors or customizations available on request.