HM-EZD+,4PAIRS,10COLS,VERTICAL,ASSEMBLY Row-to-Row Spacing: 4.5 mm Row-to-Row Spacing: .177 in Mating Alignment: With Mating Alignment Type: Polarization Number of Rows: 8 High Speed Backplane Connector | 4.5 mm .177" With Polarization | Part Number: 2170902-1 | Internal Number: 2170902-1 | TE Connectivity | Z-PACK