duplex fiber optic 1.Low insertion&back reflection loss 2.Good exchangeability& ... ) Superior qualified standard PC, APC, UPC, SPC polishing;2) 100% optic test: Insertion Loss: ≤0.3 (PC); ≤0.2 (APC); ≤ ... 0.2 (UPC); ≤0.3 (SPC);3) 100% optic test: Return Loss: ≥45 (PC); ≥60 (APC); ≥55 (UPC); ... :SC ,FC ,LC ,ST ,MTRJ ,DIN ,D4,MU Fiber Optic Jumpers Features: 1.Telcordia’s GR-326-Core, IEC Standard2 ...