. APC sets the standard in its industry for quality innovation & support. Its comprehensive solutions which are designed for both home & corporate environments improve the manageability availability & performance of sensitive electronic network communications & industrial equipment of all sizes. The mission of APC is to improve the manageability availability & performance of information & communication systems through rapid development & delivery of innovative solutions to real customer problems.PRODUCT FEATURES Covers open rack space to ensure proper airflow; Occupies 1U of rack space; Promotes Proper Airflow; Tool-less mounting; Vertical Mounting Rails with square holes..