"The SilverStone SG01 Evolution Small Form Factor Case is one very impressive product. As a matter of fact, it's one of the best SFF cases on the market today. It's all aluminum so it's lightweight, with excellent build quality and design. One limiting factor many SFF cases have is poor air circulation. This is not the situation here due to the number of fans and way they are implemented. The case comes with two 5.25" external drive bays and two 3.5" internal drive bays. They include two 80mm fans but two optional fans can be installed. They also have an optional carry bag so you can easily transport the case. No question about it, this product has LAN Party written all over it! Watch the Video to find out more..." ~3dGameMan.com