This Sun Microsystems Server Board and Tray Assembly is a crucial component for your enterprise networking and server setup. It is specifically designed for the X4170, X4270, and X4275 models, making it a perfect fit for your system. The board and tray assembly are made with high-quality materials to ensure durability and longevity. It is easy to install and use, providing a stable platform for your server components. This item is a must-have for any server enthusiast looking to upgrade their setup.