Product IntroductionThe 3U industrial rackmount chassis D Storm D-300SEA-BK-T7SA. Optional BPU series enable hot-swappable storage and RAID configuration. D-300SEA-BK-T7SA backplane supports 7 full-length add-on cards. Optional Aluminum Body reduces total chassis weight and also provides enhanced thermal cooling solution provide your system with maximum flexibility and performance, also with rugged 5.25" to 3.5" SATA SAS 6 Gbps HDD Hot-swap Rack.