For snap-in mounting of any regular size switch such as 56027, 58031, 58332, 58311 and 58312 series. Bezels can be arranged in a parallel array of any length. Bezels themselves can snap into a panel., or be mounted with the Bracket Mounting Kit. Height 1.90" (48.3mm). Two units are 2.37"W x 2.30"H (60.2 x 58.4mm). Mounting hole in panel should be 2.02"W x 1.90"H (51.3 x 48.3mm) for two bezels. Add 1.03"W (26.2mm) for each additional unit. Can be ganged, and used with end bezels.