Silverstone Tek 5.25-Inch to 3.5-Inch Drive Bay Converter Bracket (SDP10B)
The SDP10 is a new generation of 5.25" to 3.5" drive bay bracket that is capable of accommodating two additional 2.5" hard drives or SSDs (9.5mm thickness) in addition to a 3.5" drive. If you are building a system in which additional hard drive space is required and there are free 5.25" drive bays, the SDP10 is a great choice.