The ICFC12SSD9 is a 12-Fiber Singlemode SC, Duplex MPO Cassettes are designed with pre-terminated fiber and multi-fiber Push-On Connector (MPO). They allow the quick addition of new devices in a computerized system, without the need for reconfiguration or manual installation of other external devices. Internally, each fiber is routed and connected within the cassette to its appropriate port on the front end of the unit. Using ICC's fiber cassettes allow the end user to save significant amounts of time.