Rackmount rail kit. Black. Conversion kit for 4U tower barebones server chassis. With the rackmount rail kit from Supermicro, you can easily integrate your tower server into your rack. The Supermicro brand designs, develops, and manufactures optimized server solutions based on x86 architecture. The company's extensive product range includes the industry's most comprehensive selection of server, high-end workstation, and storage systems, as well as energy-efficient server components known as Server Building Blocks Solutions, which include server boards, chassis, and power supplies. Additionally, Supermicro offers powerful Universal I/O (UIO) expansion card technology and other system accessories. A strong emphasis is always placed on energy efficiency to provide effective solutions optimized for a wide range of customer applications.