1.att Compact and simple structure,light; 2.Stable performance; 3.Low attenuation error,high return loss; 4.Bellcore standard DYS FIBER OPTIC's fiber optic attenuator have adapter type andplug type.Including FC,SC,ST,LC,MU,E2000 etc.Meet theEUROPE ROHS request.Good loss value can adjust opticalpower to desired levels! Fiber Optic Attenuator(LC PLUG)