ICY DOCK FlexCage MB975SP-B Tray-less 5 Bay 3.5" SATA Hard Drive Hot Swap Backplane Cage in 3x 5.25" Bay Fits 5 x 3.5" SATA III HDD into 3 x 5.25" Device Bays. Compact and space saving design to fit multiple drives. Designed for consumers & enthusiasts gaming / media / server computer cases and servers. Tray-less design for genuine plug & play and hot swap use. Front and rear ventilation slots.