The LC/APC Female to LC/APC Female Duplex Singlemode Fiber Optic Adapter/Coupler without Flange is designed for connecting two LC/APC-terminated single-mode duplex fiber optic cables. Made from durable, lightweight plastic, this adapter supports simultaneous transmission of Tx and Rx signals and is ideal for long-distance optical communication. The LC/APC connectors ensure low return loss, improving signal quality.