Tower PC ATX, micro ATX, Mini-ITX Supported HDD sizes: 2.5,3.5" Number of 2.5" bays: 2 Number of 3.5" bays: 2 Side window Tempered glass panel(s) Anti-dust filter Black Signum 300 Air is one of our favorite black boxes casescases. Its laid out well, pleasant to the eye and as strong as the armour on a highest-level tank. Inside, you'll fit everything you need to work, play, and createand with the tempered glass side you can easily show it off to your friends.The interior of Signum 300 Air is also impressive. This roomy beast can easily accommodate two 3.5-inch hard drives with another two 2.5-inch ones (or four small drives instead). Not only that, but you can also pack a tall CPU cooler, a 350 mm long graphics card, and as many as eight fans. You get four Stratus 120 PWM fans in the welcome package, so dress warmly before you start the computer ;)A cold wind blows...PC hardware likes it when a cold wind blows through the chassis every once in a while. This way nothing overheats, a