The ST/PC 12 Fibers Color-coded Fiber Pigtail Set OM3 900µm 2m (Part number: 101000500400009) from Opterna is a Fiber Pigtails with a ST /PC connector. Fiber optic pigtail is a type of cable that is made of a connector at one end, and loose wires on the other. The pigtail connector side is used to link the equipment, while the pigtail side made of loose wires that are melted in order to be connected to the fiber cable. Pigtails can be single-mode or multi-mode, which can be accompanied by terminations like SC, FC, ST, LC, MU, MT-RJ, and others. It is normally used within the wall or rack mounted patch panel.