Features: The PCIe4.0 4x extension cable deliver blazings fast 64Gbps data transfer speeds, supporting PCIe Gen4/3 compatibility for connectivitys between M.2 NVMe devices and Oculink SFF 8611/SFF 8612 interfaces. with silver plateds cable and aluminum foils shielding, this M.2 to Oculink adapter ensures minimal signalloss and 64Gbps performances for fast speed storage or GPU expansions. for PC builders, enthusiasts, and professional to upgrades small form factor systems, laptops, or desktops with PCIe4.0 external GPUs, SSDs, or docking stations. for connecting pcie4.0 compatible GPUs, external NVMe drive, or DOCK OC5/CO6 stations in workspaces, home offices, or server requiring flexible cable routing. Customizable lengths (15cm-40cm) and backward compatibility with PCIe3.0 make this Oculink SFF 8612 adapter for high performances computings setups without fixed buckles constraints. Specifications: Materials: Plastic, silver-plateds Size: 30cm,20cm,15cm,40cm,25cm(optional) Package Includes: 1PC pcie4.0 4x Extension Cable note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.