The SPN-44-423 is a pair of solid steel side panels that provide additional security and coverage for Middle Atlantic racks. The panels are constructed with durable steel and finished with a black powder coat that ensures long-lasting use and a professional appearance. The panels are equipped with recessed lift handles, making them easy to install and remove. Additionally, the SPN-44-423. Includes an optional user-installed key lock for added security, ensuring that only authorized personnel can access the equipment within the rack. Each side panel adds 5/8in to the overall width of the rack, and the SPN-44-423 is sold in pairs, with four half-height panels included. The Middle Atlantic SPN-44-423 is an essential accessory for those who need to add additional security and coverage to their rack.