Black Box OS1 Single-Mode Fiber Optic Pigtail, 12-Strand, SC, Yellow, 3-m (9.8-ft)Meet the Black Box OS1 12strand singlemode fiber optic pigtaila high density, preconnectorized solution designed to accelerate terminations in data centers, telecom rooms, and network closets. This 3meter (9. 8 ft) pigtail features twelve OS1 singlemode fibers terminated on one end with SC connectors, while the opposite end is spliced to your trunk cable. The yellow jacket clearly marks singlemode fiber for easy identification in busy IT environments,