These tamper evident seals are normally use to secure cargo while in transit or in storage. Other uses are shipping containers, fire extinguishers, sprinkler systems, storage bins, rail freight, truck doors, utility meters, valves, tankers. Its double wire locking barb mechanism within the ball provide tamper resistance. Seven-digit sequential numbering provide additional security and traceability. Double locking barbs offer audible evidence of proper engagement and locking Embossed and consecutively numbered cannot be disengaged by intrusion or manipulation 130lb.