The outer diameter of invisible optical cable is usually only () microns.

The outer diameter of invisible optical cable is relatively small, generally around 900 microns.

It is right that the invisible optical cable is composed of optical fiber and loose sleeve. Invisible optical cable is the abbreviation of transparent tight-sleeved optical cable coated with hot melt adhesive. Loose-structured optical cable, also known as loose-sleeved optical cable, is a kind of structural optical cable that loosely places colored optical fibers in grooves or tubes.