Technical details and special features atxmicro atx specification compliant front door made of aluminum screwless fan holder at rear panel and top panel for 12cm fan additional 12cm fan installation screws at top panel possible supports up to six 525 drives extra black frame 525 to 35 size for 35 device installation screw less for 525 devices and slots four detachable hdd shockproof trays for easy installation and reducing vibration for silent operation 90deg sideward hdd cage de