Dual M.2 22110/2280 PCIe NVMe SSD expansion card Port: 2 x M.2 22110 or 2280 PCIe (Gen3 x 4) NVMe SSD slots PCIe and lanes: PCIe Gen3 x 4 Bracket: Low-profile (default) Low-profile flat and full-height brackets are also included Dimensions (L x W x H): 170.5 x 68.9 x 19.3 mm