PCI Express RA assy 5.8mm slot 2.3mm pc Connector System: Board-to-Board Number of Positions: 64 Centerline (Pitch): .039 in Centerline (Pitch): 1 mm Termination Post & Tail Length: .091 in Board-to-Board 64 .039" 1 mm | Ampseal Header | .039" | TE Connectivity |