Jeirdus OS1 OS2 LC/ST LC to ST Simplex Fiber Optic Coupler Female to Female Connector Single Mode LC-ST Fiber Coupler Adapter.Insertion loss ¡Ü 0.20 dB,Return loss 45~60 dB,Repeatability ¡Ü 0.10 dB,Changeability ¡Ü 0.20 dB,LC adapters uses ceramic sleeve to connect between two SC fiber Optic cables.Adapters can lock the connectors and get low insertion loss to transmission optical signal.Our fiber optic adapter are suitable for fiber patch panel, which means you can use them in any type of enclosure with rectangular cutouts.Meets the Telcordia and IEC 61757 stander, all materials compliant with RoHS requirement