For application, where a stainless-steel tube is needed to protect optical fibers against the surrounding influence, one abbreviation is catching one of the most important attention to consider. The so called “EFL”.

When you work or deal with cables which contain optical fiber, you probably noticed designations like “FIMT”, “FIST”, “SST” or maybe other abbreviations which are related to a fiber optic cable. But what do those abbreviations stand for exactly and what is the meaning behind these terms?