The SPN-37-312 is a reliable and secure solution for those looking to maintain a professional and organized rack setup. These solid steel panels come equipped with recessed lift handles, making installation and removal quick and easy. The SPN-37-312 also. Includes an optional user-installed key lock, providing extra security for the equipment in the rack. The panels are constructed with steel and come in a black powder coat finish that looks great in any rack setup. Each side panel adds 5/8" to the overall width of the rack. The SPN-37-312 is sold in pairs, with each pair consisting of four half-height panels. Overall, the SPN-37-312 is a practical solution for those looking to add security and a professional appearance to their rack setup.