Rack hardness is very good, in the desktop chassis can put 5.25-inch optical drive
Converted into a 3.5-inch drive bays, 2.5-inch hard drives, SSD drive bays,
12cm fan bit; when you install a fan, it will account more than a optical drive.
Support 3.5-inch (or 2.5 inch or SSD) hard drive and a 12cm fan;
Above Install hard disk , below install the fan. Make sure the hard disk high speed read. Effectively enhance the machine speed and extend drive life.

Specifications:
Support: Solid State Drives /2.5 inch hard drive, 3.5-inch hard drive
At the same time support the installation: a 12cm fan
Material: Plastic
Size: 145 x 118 x 20mm (L x W x H)
Color: Black

Features:
3.5-inch hard disk mounting screw holes
Hard drive cooling fan mounting screw holes
Hard disk rack mounting screw holes
2.5-inch hard drives (SSDs) fixing screw holes

Package included:
1x SSD Hard Drive Adapter with screw