This adapter will fit all FIS Fiber Optic Power Meters, as well as FIS OV Series Fiber Optic Test Sets. It provides you with a sure-grip knurled surface and precision machining, providing ease-of-use and fast connectivity to your fiber optic test equipment.  Also available are Universal (2.5mm) Adapters (ST, FC, SC, E2000), LC/MU Adapters (1.25mm Universal Adapters), FC, ST, SMA, MTP and MT-RJ Adapters.