In international shipping, container seals are an important part of the shipping container. They are the numbered tag that is put around the lock of a shipping container once it has been loaded. This seal number is just as important as the seal itself.

According to different uses and purposes, sercurity seals consist of four types: plastic seal, cable seal, high security seal (container seal) and instrument seal.

They are widely used in the industries of railway transport, highway transport, port, airline, oil & gas, chemical, electric utility, post office, logisitics, express etc, and used on the container, tanker, truck, bag, water meter box, electric meter box ect, which needs to be loss-prevented.