iStarUSA Group 3U mATX 5xHS 3.5 Rackmount Chassis Black PS2 PS, Slim Optical (D-350HB-T) 5 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