The ExpressCage MB324SP-B brings to you highly consumer-friendly enclosure made for anyone that requires affordable storage density. Fit up to 4 x 2.5" SATA/SAS HDD/SSD (7mm-12.5mm) into a single 5.25" bay with the ability to hot swap for easy drive replacement and single channel SAS support (SAS host required). With a strategically placed 40mm cooling fan placed behind the unit and all around ventilation, your drives will stay cooler than the Arctic.