EXFO EI-EUI-89 FC Optical Connector, use for EXFO AXS-100,AXS-110,FTB-1,FTB-100,FTB-150,FTB-200, FTB-300,FTB-400,FTB-500,MAX710B,MAX715B,MAX720B,MAX730B OTDR, FLS-300,FLS-600,FVA-600......