OM4 Multimode SC/UPC Fiber Loopback Cable is a high-performance testing tool designed for 10G/40G/100G fiber optic networks. Constructed with OM4 multimode fiber, it provides ultra-low insertion loss and high return loss, ensuring accurate and reliable loopback testing in data centers and high-speed network environments. The SC/UPC connectors ensure secure and precise connections, making it ideal for validating transceiver ports, diagnosing faults, and performing system checks. Compact and reusable, this loopback cable is essential for efficient equipment testing and maintenance.