Silverstone Tek Redline Series ATX, Micro-ATX Computer Mid Tower Case with 2x USB 3.0 Front Ports, Black RL04B Positive pressure design for effective dust reduction Removable dust filter for top and bottom vents Smart backside cable routing design Motherboard back plate opening for quick CPU cooler assembly Support easy access drive bays with tool-less design All black painting inside with stylish look Highly flexible drive storage options Support seven expansion slots and cards up to 11.5 inches long