This is a high-quality metal enclosure designed specifically for 5 PCIe to M2 NVMe expansion board. The chassis retains all for 5 motherboard connectors. This enclosure is compatible not only with for PCIe to NVMe SSD series expansion board, but also with PCIe to NVMe expansion boards. The chassis' hollow design also meets the LED display requirements of most PCIe to NVME boards. The only caveat is the height of the copper standoffs used by PCIe to NVME boards, which must not exceed 17mm. The chassis also supports standalone installation of the for 5 and official and heat sinks. Cooling: Supports installation of official and for 5 heat sinks. Installation: for 5/ for 5 PCIe expansion board series. Installation Instructions: During installation, the copper standoffs/screws on the bottom of the for 5 must be replaced with the included 6mm copper standoffs, otherwise the holes not align. Color: Black Material: Metal Package Contents: 1 * case 1 set * accessories (random colors, don't accept the specified color) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.