Axiom fiber optic couplers allow you to connect fiber cables to extend the length of a cable run. A great solution when you need to join two fiber patch cables together. The coupler is panel-mountable so you can use it where all your connections are accessible. - Duplex Female Coupler - Extends length of fiber patch cables - Works with 62.5/125, 50/125 multimode fiber or 9/125 singlemode fiber - Female to female feed-through