Tripp Lite Wall L Bracket 150MM and 300MM - High-Strength Wall Bracket Helps You Create Custom Cable Management Schemes. The Smart Rack SRWBWALLBRKT is a black powder-coated metal bracket for easy installation with your wire mesh cable tray. This L-shaped bracket allows you to mount sections of cable tray along the wall of your data center, network closet or industrial space to extend your cable management application. It mounts to the wall with user-supplied hardware and then easily snaps into the wire mesh. It fits cable tray sections measuring 150 to 300 millimeters in width, such as Tripp Lite s SRWB6210STR, SRWB6410STR, SRWB12210STR and SRWB12410STR. For best practice, tray support is recommended approximately every five feet.