KingWin Multi-Bay Internal Rack with 3 Drives for 2 Bay Space SATA Mobile Rack, KF-3001-BK
A multi-bay SATA internal hot swap enclosure that takes 3 hard drives with only 2 bay slots.  It also supports RAID, instand HDD installation, and hot swap ability.  This space saving multi-bay enclosure is easy to use, and simple to install.