The double sided Koolance HD-60 captures heat from the spindle motor and printed circuit boards of one or two 3.5-inch IDE, SATA, SCSI, or SAS drives. The HD-60 allows any available fitting diameter. The HD-60 is an all-metal water block, providing a thin profile of just 5/16" (8.5mm) for single or dual hard drive cooling. One bi-pack of thermal encapsulate is provided with the HD-60 for cooling a single hard drive. A Second Hard Drive Kit is required if cooling two drives. NOTE: The HD-60 water block may not work in all systems. If your chassis places the hard drive connections near a side panel (perpendicular to the front), make sure there is sufficient clearance for the HD-60. For a better understanding of compatibility, please click here.