This item is noncancelable and nonreturnable. 

The AXS-FAN-K Rack Fan Kit for AXS (2 Fans) from Middle Atlantic is a set of (2) fans designed for use with AXS series racks. This unit features a ball-bearing design to ensure quiet operation in addition to increasing the airflow in your rack or enclosure.

These 4-1/2" fans are only 1" in depth and mount flush in your AXS rack. The units are powered by 115V. The fans have a free-air rating of 33 dBA. The two fans combined will push up to 114 cubic feet of air per minute. A separate temperature display and LED are available for this unit.