HM ZD 4 PAIR RECEPTACLE ASSEMB Row-to-Row Spacing: 1.5 mm Row-to-Row Spacing: .059 in Mating Alignment: With Mating Alignment Type: Polarization Number of Rows: 12 High Speed Backplane Connector | 1.5 mm .059" With Polarization | Part Number: 6469294-1 | Internal Number: 6469294-1 | TE Connectivity | Z-PACK