These single mode fiber optic patch cables are FC/APC terminated on both ends, making them ideal for systems that are sensitive to back reflections. The narrow key connector utilizes a ferrule that has an 8° angle polished tip, ensuring typical return loss of 60 dB. Each cable is FC/APC terminated. The Armoured Fiber Optic Patch Cord is suitable to be deployed in a harsh environment as it consists of a spiral steel tape armouring to protect the optical fiber. It is available in both simplex and duplex types. Need help?Armored Duplex Fiber Patch Cables, OM4 and OM3 Fiber Optical jumpers, 50/125 10G, 40G, 100G, OFNR Riser Rated Optic Cables. OM1 LC LC Fiber Patch Cable | 1Gb.