The LC/UPC Connector 20pcs Duplex Single-mode 3.0mm Dual-core Optical Fiber Connector Loose Parts are for creating reliable and high-performance optical fiber connections. Each pack includes 20pcs of LC/UPC connectors, ensuring you have enough for your project. These connectors are specifically designed for duplex single-mode optical fiber connections and feature a 3.0mm dual-core design for enhanced performance. They are also compatible with other customized loose parts, allowing you to create a customized setup that meets your specific needs. Installation and maintenance are easy, making these connectors a convenient choice for any optical fiber application.