A typical security plastic seal usually consists of three parts:
Lock body: It is usually a plastic head with an internal locking mechanism, and may contain metal claws, barbs or magnetic locks, etc. inside.
Lock rope/lock strap: A slender plastic strap or rope that can pass through objects that need to be sealed.
Serial number/barcode: The vast majority of security seals are printed with a unique serial number, and some also have a barcode or QR code attached. This is the key to its traceability.