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This SFF-8643 female to female coupler adapter adopts professional PCBA board design, used to extend and connect Mini SAS HD data cables. It complies with PCIe 4.0 transmission standard, ensures high-speed data transmission without signal attenuation. Standard industrial pin definition is widely compatible with server RAID cards, hard disk backplanes, storage expansion cards and other devices. Small size saves equipment internal space, easy to install and use, perfect for data center server assembly, storage cabinet wiring and equipment line lengthening transformation.