Icy Dock MB882SP-1S-2B 2.5 inch to 3.5 inch SATA HDD/SSD Converter - Black

Mac Pro
This Caddy works Great with the Mac Pro if anyone needs to know.

Pefect Fit and simple to install - Recommend the Crucial M4's - and remember to enable TRIM support...

Icy Dock MB882SP-1S-2B 2.5 inch to 3.5 inch SATA HDD/SSD Converter - Black

Icy Dock 2.5-3.5 inch converter
This product was quite expensive when I ended up paying