Fiber Optic patch cord Using the most advanced adjustable core technology,End of scars, no dirt echo without loss Fiber Optic patch cord1.FeaturesCompliance with the Standard of IEC and YD/T1272High Return Loss and Low Insertion LossHigh Reliability and StabilityGood Repeatability and InterchangeabilityVarious Types of Connectors: FC, SC, ST, MU, LC, MTRJ, MPO, E2000, etc.PC, UPC , APC ...