The HP I/O Shield is designed specifically for HP Pro 3130 MT desktop motherboards. Made by HP, this unit is an essential component to ensure proper installation and compatibility with the motherboard. With dimensions of 2 inches in height and 6 inches in length, this I/O shield is a single unit that provides the necessary support for connecting input/output devices to the motherboard. Ideal for desktop machines, this product from HP is a reliable choice for enhancing the performance and stability of your computer system.