Sun products are designed for seamless integration into various environments. They are scalable solutions optimized for critical tasks. Be sure that Sun products represent the latest developments in computer industry to give you more power and strength.PRODUCT FEATURES:Allows components to be mounted vertically (vs. horizontally);Holds up to 6 Us of equipment such as switches and hubs;Obtains power from the redundant AC power grid, thus customer must also order/have one redundant library power supply.