Description 1m (3ft) MPO-8 APC to 4x MDC Duplex UPC OS2 Harness is a 1-meter yellow single-mode cable designed to split an 8-fiber MPO APC female signal into four high-density MDC duplex connectors. Utilizing an LSZH jacket and Type B polarity, it provides an efficient ultra-short range port expansion solution. This harness is ideal for the latest high-density single-mode data center deployments requiring maximum space efficiency.