Supports 6x U. 2/U. 3 PCIe NVMe SSD, with a max drive height of 9.5 mm ^^ Designed to fit into any standard external 5.25" optical drive bay ^^ Utilizes 3x slimSAS 8i (SFF-8654) to support 6x U. 2/U. 3 SSDs ^^ Supports PCIe 4.0 specification with transfer rates up to 64Gb/s per drive bay ^^ Supports Tri-mode controllers PCIe/NVMe pinout (Broadcom, Areca, and more)