This document describes duplex armored fiber optic pigtail/patch cords that feature stainless steel protection tubes to shield optical fibers from damage caused by torsion or environmental extremes. They can be installed without additional protective tubing, saving space and simplifying maintenance. The cords support various connector types and are suited for applications including machine rooms, FTTH networks, testing equipment, and more. Specifications list low insertion attenuation and high return loss even at wide operating temperatures.