The 8639G4-TPA-PR test adapter or test fixture kit facilitates Source and Sink compliance testing for SFF-Hosts and Devices. These SFF-8639 Gen4 fixtures utilize the multifunctional connector system supporting single/dual port SATA, dual and MultiLink SAS, and/or up to four (4) port PCIe device configurations. The SFF-8639 Gen4 receptacle fixture will accept devices with plug connectors that are in accordance with SFF-8482, SFF-8630, and SFF-8680.