acidproof,corrosion resistance,good insulation,not easy to aging,strong tolerance,good flexibility:pull tight locking mechanism, locking range is adjustable, easy to use;
one time using products, can’t be opened once locked;
one time using products, theft against, keep safe.can be used in customs, railway, oil-transportation, foreign trade testing department and the confidentiality purposes in finance, store, electrical, petroleum, air transportation.