iStarUSA Group D-340HN-T / 3U MATX 4x3.5 HS Chassis Black 4 tray less 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 Rack mount or desktop Convertible