The HPE ProLiant DL380 Gen11 2LFF Primary Riser Cage Kit (P48823-B21) is a specifically designed component for server setups. This riser cage kit, compatible with the DL380 model, is manufactured by HPE, a trusted brand known for producing high-quality computer hardware. The kit adds additional riser slots to the server, allowing for more options in connecting and expanding components within the system. This product is essential for server maintenance and upgrades, ensuring seamless compatibility and functionality in professional computer setups.