2MMHM HDR ASY,12R SEL/LD 144 P PCB Connector Type: PCB Mount Header Data Rate: ≤1 Gb/s Number of Columns: 12 Number of Rows: 12 Backplane Architecture: Mezzanine PCB Mount Header ≤1 Gb/s 12 | Hard Metric Backplane Connector | Part Number: 5120779-1 | Internal Number: 5120779-1 | TE Connectivity | Z-PACK