The 2A81 is a red base component designed for Honeywell's Series 2 line of pushbutton switches and indicators. It forms part of a modular, three-piece display screen assembly, which also includes a transparent cap and a legend insert. This single-section base is translucent, allowing for illumination from behind. The base itself has a width of 16.3 mm and features a key slot for correct alignment during installation. This component is used to create customized, legended, and illuminated pushbuttons for various control panel applications.