[Main Parameter]: ST to ST; MI; Single Core; Multi-mode/;Single-mode. [Features]: Can be used with 2 ST single-mode or multi-mode fiber optic jumper cables,Connect two Singlemode FC/FC patch cords together or use in an ST patch panel [Dimension]: 37mm x12.5mm/1.46' x 0.49'(L*D), Come with the dust cover,Thread Diameter: 9mm/ 0.35' [Application]: Optical communication system, optical instruments, CATV, Fiber-optic broadband access network, optical fiber sensors [Easily installed]: Quick assembly FC connector can provide quick and easy termination of fibers in the field.