Cookinkitch OTDR Launch Cable Box, 1000 m SC/UPC to FC/UPC Single Mode (9/125) Fiber Optic Tester Extension Cord Dead Zone Eliminator

["Instrument Compatibility: 1000 m FC/UPC to FC/UPC. Direct fit for industry-standard OTDR instruments with FC/UPC ports","Dead Zone Elimination: Shifts OTDR blind spot beyond near-end connector. Enables accurate measurement of first fault point","Zero Splice Fiber: Continuous 1 km single mode fiber with no fusion splices. Provides clean, event-free OTDR baseline","Field Case: Waterproof, dustproof ABS box with internal ties and hook. Protects fiber on job sites; ready for outdoor use","Customer Service: If you have any questions about this OTDR Launch Cable, please contact us via Amazon's messaging system. We will respond within 24 hours"]