The Middle Atlantic SR28-6-FK Fan Kit is a powerful cooling solution designed for the 32in deep, 28in wide SR Series Wall Racks. It ensures effective thermal management by moving up to 440 CFM (Cubic Feet per Minute) of air at a low noise level of 52 dBA (measured at 1 meter). This fan kit. Includes two 120V AC-powered 6in fans, which are essential for maintaining optimal airflow within your rack system. For added safety, the kit comes with four fan guards—two for the inside and two for the outside of the rack. The package also. Includes necessary vent blockers to optimize airflow, along with mounting hardware and a 6-foot power cord for easy installation. This fan kit is ideal for ensuring your equipment stays cool and operates efficiently in any installation.