The LC/UPC Female to LC/UPC Female Quad Singlemode Plastic Fiber Optic Adapter/Coupler with Flange is designed for connecting four LC-port singlemode fiber optic patch cords, supporting 9/125μm fiber transmission for high-speed, long-distance communication. Featuring UPC-polished interfaces, it ensures low insertion loss and high return loss performance. Its quad design enables efficient multi-channel optical signal transmission, while the lightweight yet durable plastic housing provides a cost-effective and reliable solution. Equipped with a flange for secure mounting on patch panels or adapter plates, this adapter is widely used in data centers, FTTx, fiber optic communication networks, and optical testing environments, where multi-channel signal transmission with low loss and high stability is essential.