Optical fiber adapters, also commonly known as flange plates, are mainly used for connecting and fixing optical fiber active connectors, enabling optical signals to be transmitted with minimal insertion loss. The connection method of the MPO optical fiber adapter is different from that of the single-core SC optical fiber adapter. The SC optical fiber adapter is equipped with a ceramic sleeve inside, and when the SC connector core is connected, it is precisely aligned through this sleeve The MPO adapter precisely connects the two 0.7mm diameter guide holes on the left and right sides of the MPO connector core with the guide pins (also known as PIN pins). Therefore, there is no distinction between single and multi-mode MPO adapters. The reason why SC fiber optic adapters have single and multi-mode distinctions is that the quality of the sockets is different. MPO adapters are widely used in base stations of communication systems, optical fiber distribution frames (ODF) in building machine rooms, MPO boxes, and various test instruments.