Usage scope: Youan Emergency Escape String is a credible fire lifesaving device, widely used in personal abode, hospital, hotel, scriptorium, public entertainment place and labor-intensive site. Material capability: the core of the Escape String is made of military aerial steel line; epiboly is knitted by the nylon string. Military aerial steel line ensures stability of the Escape String. Usage: Once the construction is on fire and the safety exit is blocked, please take out Escape String from the package, then fix up the hook on the window or the building, escape from the fire field from the window quickly. Technical parameter: The diameter of the whole string is 8 millimeter; the diameter of the steel core line is 3 millimeter; the total length of the string is 20 meter. Main components: safety hook, steel core string, rubber cushion Grasp the rubber cushion when you are downing in case of scalding Adjust the rubber cushion aptly to control the downing speed