Covered optical cables are mostly single-core and double-core structures, and can also be made into four-core structures. The cross-section is in the shape of a figure. The reinforcement is located at the center of the two circles. Metal or non-metal structures can be used. The optical fiber is located in the geometric center of the figure. .
It is used to produce butterfly-shaped optical cables, and the sheath material is LSZH low-smoke halogen-free fuel resistance.