This M.2 NVMe PCIe x4 low profile adapter is very small in size and can fit into a 1U rackmount vertically. It is only 130 x 31 x 10 mm in size and when seated in the PCIe slot it only stands up by 23 mm. With the small size, it is capable of holding the long (110 mm) M.2 NVMe available. It comes with Heat Sink and Heat Pad for Thermal Management. This adapter will also support other shorter NVMe length like 80, 60, 42, 30 mm in length. With this adapter, your NVMe is linked to the PCIe x4 lanes using PCI Express v4.0/v3.0 specifications for super-fast booting or data access. This M.2 NVMe adapter will give you the best performance possible for your system.