Vantec 3 x 3.5 Inches SAS/SATA SSD/HDD Aluminum Mobile Rack (MRK-M3503T) Design to Fit different size drives using 3.5" or 2.5 SATA/SAS drives for different needs. Your choice could be limitless like Everyday storage to Enterprise Class Storage in Datacenter. The All Aluminum Frame is a perfect fit for any Rack mount or Desktop/Tower chassis. It provide excellent heat dissipation and Strength without the Weight. The Cooling fan(s) is designed to provide rapid air exchange, this will purge out hot air and draws in cool air to keep all the drives in a Cool and quiet state. This adaptable design enable the of use SATA or SAS drives for storage, you can choose between any 3.5" or 2.5" SATA I/II/III, SAS I/II HDDs or SSDs. Specifically selected to be RAID Ready for your choosing. This versatile design allow for easy link between your drives and the RAID controller. Space saving features helps maximize the integration of multi-drive in any chassis to use less space for more capacity. Quick hot-swapping of drives makes it easy for adding or removing drives for Off-Site storage of your critical data. The safe guards of your data are ever more important with this design. The Patented design Dampener Springs minimize the vibration to the drives. This will help extend the life of the drives and at the same time reduced noise.