This cable is suited for all applications requiring a duplex fiber connection using ST/PC connectors. Such as when linking two AUDAC R2's or M2’s through fiber interconnection. Use a PROCAB FBS125/C coupler to connect two FBS125 cables for even longer fiber links. This cable features an LSHF (low smoke halogen-free) outer jacket.https://www.provisionavl.com/product/fbs125.html