ST-ST Fiber Optic Pacthcord 1.Low insertion loss & High return loss 2.OEM ... delivery Special Features 1.product: MM ST-ST duplex fiber optic patch cord2.mode:Multimode,SM3.fiber core:simplex,duplex,4 ... ,Matrial Type:pvc,hytrel,LSZH,OFNP,OFNR ST-ST Fiber Optic Pacthcord