SC-307 Can make to handle cas also. Drive Bays: 5.25"*4ea External, 3.5"*1ea External, Super space design compatible for various MB. High quality SGCC steel sheet, strong and durable. (SECC optional ) with USB and audio ports on front panel. Structure size:375*178*425mm Case size: 410*178*425 mm Carton size: 470*220*470mm QTY:1400PCS/40"HQ