This is a 138m 6xLC (male) to 6xLC (male) aqua armored 6-strand gel-filled fiber trunk cable with Pulling Eye. An OM4 cable has a core size of 50 microns that can support 100 Gigabit Ethernet at lengths measuring up to 150 meters. It is most commonly used for 100 Gigabit Ethernet applications. This optical fiber, nonconductive, gel-filled cable is best suited for use in exterior fiber-optic applications. A duplex cable is a two-strand fiber optic patch cable that works best with transceivers that both transmit and receive.