The Rack Mount Kit 3 (RMK3) contains rails and accessories for installing a myUTN-800 ordongleserver ProMAX into a rack.These rails will fit a 19" rack that is at least 14.5" deep.This installation guide describes the installation of a myUTN-800 respectively dongleserver ProMAX into a rack using the RMK3.There are a variety of racks on the market, which may mean the installation procedure will differ slightly. Also refer to the installation instructions that came with the rack you are using.Only pull out the myUTN-800 respectively dongleserver ProMAX temporarily for installation,maintenance and the connection or removal of USB devices.