To keep your SolidRack wall cabinet cool, install the premium Fan Set for Wall Rack Cabinet in the ceiling of the rack. This fan kit arrives with two pre-assembled fans, and includes strong but quiet ball bearings, and an easy-to-install power connection that fits flush into the ceiling of your rack mount wall cabinet. Compatible with SolidRack wall mount 6U (Y10E001-B1, Y10E004-B1). 9U (Y10E002-B1, Y10E005-B1), and 12U (Y10E003-B1, Y10E006-B1) racks.