5PCS FC/APC to FC/APC Singlemode Simplex Small D Fiber Adapter, Female to Female, 0.2dB Insertion Loss,Red Protective Dust Cap Keeps Adapter's Interior Clean from Dust,Threaded Adapter Provides Easy Installation and Removal. Extending Fiber Connection with Adapters. With high-precision components and tool-less design, the adapters allow two devices to communicate from a distance through a direct connection with the fiber optic line By linking two connectors precisely, fiber optic adapters allow the light sources to be transmitted at most and lower the loss as much as possible. At the same time, fiber optic adapters have the merits of low insertion loss, good interchangeability and reproducibility Nickel-plated Copper Protects the Metal from Corrosion.The adapter is made of machining, its structure is more sturdy with high hardness and precision Application for Optical Fiber Connection.The adapter can widely used in server rack, patch panel, optical distribution frame (ODF), CATV, optical fiber broadband access network, etc. A fiber optic adapter, sometimes also called a coupler, is a small device designed to terminate or link the fiber optic cables or fiber optic connectors between two fiber optic lines. By linking two connectors precisely, fiber optic adapters allow the light sources to be transmitted at most and lower the loss as much as possible. At the same time, fiber optic adapters have the merits of low insertion loss, good interchangeability and reproducibility. Extending Fiber Connection with Adapters. With high-precision components and tool-less design, the adapters allow two devices to communicate from a distance through a direct connection with the fiber optic line. Nickel-plated Copper Protects the Metal from Corrosion.The adapter is made of machining, its structure is more sturdy with high hardness and precision. Application for Optical Fiber Connection.The adapter can widely used in server rack, patch panel, optical distribution frame (ODF), CATV, optical fiber broadband access network, FTTH Network Connection,CATV/CCTV Connection, Local Area Network, etc. Nickel-plated Copper Protects the Metal from Corrosion and Wear One-piece Design Zirconia Ceramic Sleeve with High-precision Alignment ≤0.2dB (Typical) Low Insertion Loss Protective Dust Cap Keeps Adapter's Interior Clean from Dust Threaded Adapter Provides Easy Installation and Removal