Finance and Business How do I mount a Cisco switch on a rack? What is a rack mount kit? Part Number: RMK-19TR-A. Matrox rackmount kits are designed to enable easy installation of your Matrox appliance in a rack environment. The kit includes: Rack mounting shelf (19 in / 48.26 cm) Related Posts:How much is rack space in a data center?What is a 4U rack?Simple floating shelves are what you should build.Is flexible gas line safe to use for main?