The Antec VSK4000E U3 case only offers the essential features every PC builder requires to configure a performing system. It is a SGCC steel case with clean-cut appearance and impressive durability. VSK4000E-U3 also meets Thermally Advantaged Chassis (TAC) 2.0 guidelines and is upgraded with two USB 3.0 ports, nine drive bays, and seven expansion slots. VSK4000E-U3 is here to provide the basic platform to start building your very own system. It's humble design and practical functionality contains the fundamentals for a performance chassis. The VSK line is designed to be a stepping stone for those who want to upgrade their system later on. Each chassis devotedly serves their purpose as a cost-effective, unforgettable part of your system building experience.