The Model 4000 Surface-Mounting Kit makes it easy to install the following Time Mark Liquid Level Controllers: Models 403, 404, 4042, 4052, 4062 and 408. This 20 gauge steel enclosure features a removable top panel for easy access to connections. The mounting kit comes complete with everything you need, including steel support brackets. Designed for applications that require surface-mounting of our Liquid Level Controls.