iStarUSA Group D-350HN-DT / 3U MATX 5xHS 3.5 Chassis Black 5 trayless and hot swappable 3.5" bays for HDD quick swap Slim optical drive bay (12.7mm height) available USB 3.0 in front for easy access Sleek aluminum front w/ various color options for HDD handles Rackmount or desktop convertible