To help reduce the amount of time required to properly install Dell components into either of the Dell rack cabinets, Dell has created the Dell Rack Mounting Kits. They include the unique-to-Dell VersaRails mounting brackets, which are designed to make physical set-up of the hardware faster than ever before. This product is designed for your Dell PowerEdge CX200 / CX300 Servers and Standby Power Supply (SPS). This kit is designed for installation into round or square hole, 4-post cabinet style racks meeting certain specifications.