1.Supports high speed PCI-E 1X, 4X,8X and16X card, but work at 4X speed only 2. design with dual vertical 90 degrees direction for PCI-E Card 3..High Speed flexible cable is for 1U,2U and ATX/BTX chassis 4.Utilize high quality flexible cable which is extremely soft and compact 5.Easy to install and no need any soft driver. golden finger protection cover and dustproof design. Experienced design and durable material for High frequency and low attenuation. PCB-Swaddled and fixed with Bolts and nut to prevent tearing and short circuit for PCB-Cable solder points Stable PCIe Gen4 8Gbps or higher with high quality Axial Cable. Colour:Black Material:plastic Package Contents: 2 x PCI Express 4.0 4X Extension cable 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.