Optical fiber patch cord Low insertion loss High Return loss Good Quanlity the Lowest price TLC Rohs ISO certification ... eccentricity um<50Fiber core undercutnm<50Fall apart testdBH=1M,connector free-falling 5 timesInsertion loss change< 0.1,Return loss change< 5, ... -contortiondB2.5Kg ,200times, 10times/minutes, ±80°Insertion loss change < 0.1,Return loss change< 5, No flab, No distortionPackage/Clean, ...