The Rackmount.IT 19" kit (RM-SR-T16, SKU 590035) is designed for Sophos XGS office devices with dual power supplies (XGS 118/118W, 128/128W, 138, and several related XGS office variants). It offers a 19" 2U mounting base that secures the device and its backup power supply, maintains front port accessibility, and improves cable management. The device is not included.