Single-mode 9/125 Optical Fiber Cables can be divided in to simplex and duplex. Single-mode Simplex Fiber Cable is single strand and Single-mode Duplex Fiber Cable is zipcord cable which is tight-buffered and jacketed. The Single-mode fiber patch cables offered in standard PC polish and UPC (Ultra Polish). Single-mode fiber cable indoor type is usually with a yellow color jacket so that it is easy to identify. We usually use SMF as the short form for single-mode simplex fiber cable or single mode duplex fiber cable. Single-mode fiber cable indoor type including the single mode fiber cable used to make patch cables; the diameter is usually 1.8mm, 2mm or 3mm, Single-mode fiber cable is used for long distance data transmission. These cables are round type, we also supply ribbon single mode fiber patch cables.