StarTech.com x4 PCI Express to SFF-8643 Adapter for PCIe NVMe U.2 SSD. Host interface: PCIe, Output interface: U.2, Expansion card form factor: Full-height / Low-profile. Product colour: Red. Width: 18 mm, Depth: 81 mm, Height: 44 mm. Package width: 144 mm, Package depth: 177 mm, Package height: 31 mm. Products per master (outer) case: 60 pc(s), Master (outer) case width: 378 mm, Master (outer) case length: 495 mm