Features: brand new and high quality Allow you to install dual SFF 8643 NVMe U.2 SSD drive through PCIe X4 X8 X16 Card to your PC System. It's the best and easy solution to install an extremely high performance Enterprise-Class PCIe-NVMe U.2 SSD in your desktop for enthusiast gaming and workstation markets Convert U.2 PCIe-NVMe SSD to work in main board PCIe x4 X8 X16 bus slot for Mac Pro 2009, 2010 and 2012 models with High Sierra OS installed support PCIe-NVMe SSD Low Profile PCIe bracket on board and Regular size bracket included,no driver required Specifications: Name:PCI for Express to Dual SFF 8643 Adapter Model: SU-EF8602 A3 Master: ASM2812 Interface Speed: 20Gb/ 30Gb Support: PCIE X4 X8 X16 Lane Colour: Black Material:Metal Size: approx 84.5x58mm/3.3x2.28in Package Includes: 1 PC x PCIE X4 to SFF 8643 Adapter Card 1 PC x Bracket note: Only the above package content, other products are not included. Light shooting 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.