StarTech LC Loopback Plug, Single Mode 9/125 LC Fiber Optic Loopback Adapter, LC/UPC Connector Loopback Test Plug - 0dB - LC/UPC Single Mode fiber loopback test plug; Low-loss 0dB for precise baseline testing; For Single Mode OS1/OS2; Low Insertion loss; Repeatability within 0.2dB; Rated for 1,000 test cycles; Compact ABS housing; IEC and RoHS compliant
