Simplex fiber pigtail and duplex fiber pigtails are available, with different cable color, cable diameter and jacket types optional. Pre-terminated pigtails with LC, SC, FC, ST connectors — 0. 9 mm tight buffer in single mode and multimode. A fiber optic pigtail is a short length of fiber cable with a factory-terminated connector on one end and a bare (stripped) fiber on the other, designed for fusion splicing to incoming fiber. FS fiber optic pigtails offer a fast way to make fiber optic communication devices in the field by fiber splicing, fully manufactured and tested by industrial standards. Understanding fiber‑optic color codes is essential for any technician tasked with installing, maintaining, or troubleshooting modern fiber networks.