PCI-Express 4.0 Slimline SAS SFF-8654 to HD SFF-8643 PCBA Female Adapter With BracketThe Adapter with Full and Low Profile PCI Slot Profile Mounting BracketThe Adapter External will work both on the host and device side. it is reversible design. The adapter support SAS to SAS or PCI-E to PCI-E singal. Supports up to 12Gb/s Mini SAS or PCI-E 4.0 Data Transfer Rate.