This is a PCIE USB adapter, which is made of safe and gentle PCB materials. It is well-made, durable, and can serve you for a long time. With reasonable design and practical functions, it can be widely used in desktop computers to help you make better conversions. This is a very practical adapter that will bring you a good experience. Features -Color: Black -Material: PCB. -Size: About 7.00X2.00X1.00cm/2.75X0.79X0.39inch. -It is made of materials, safe and durable, and will not be easily damaged. -Excellent manufacturing technology can help ensure that the power supply of each interface is more stable. -Provide you with faster work efficiency and make your operation smoother. -High-speed computing core, strong compatibility, can be well applied to your desktop computer. -Fine workmanship and good conductivity can ensure more stable transmission. Package list: 4 x PCIE USB Adapters