Cisco CK-300RM-8-19 rack-mount kit is hardware for fitting compatible SF300 and SG300 series switches into a rack. It provides a way to position the switch as part of an organised network installation.
The kit is specified for a 19-inch rack and a 1RU installation, matching the rack format described for this item. Its purpose is to mount the switch in that space rather than serve as a network component itself.
The package contains two extension brackets and mounting screws. Compatibility is listed for Cisco SF300 and SG300 series switches.