More compact, this new case design adds minimal height to a drive. Store drives on a shelf vertically - this case is steady while standing up. WiebeTech has gone trayless with the TrayFree bays in the RTX series, you'll need somewhere to keep your hard disks when not in the unit. We know that customers are swapping out entire RAID sets, and are transporting single drives between two locations. The case is made with textured, anti-static plastic. A label area, lets you mark it up however you please.