The 9131NF Singlemode Fiber Positioner Kit includes the high resolution high stability fiber positioner Model 9091, a coupler body Model 9092, a microscope-objective holder Model 9123NF, and adapters Model 9127NF and 9126 for mounting FC and ST connectorized fibers. An 8-32 threaded mounting hole allows placement on any post or pedestal in your lab.