Opaque Flat Pushbutton The 3SB35 series of pushbuttons are metal, round and have a mounting diameter of 22mm. This series of actuator are supplied with a holder. Pushbuttons with flat button Spring return or latching versions available Protection rating of IP67 PHASE OUT NOTIFICATION This product is in obsolescence mode and is due for discontinuation by the manufacturer. We recommend that you review the new pushbutton range SIRIUS ACT which is the alternative range proposed by the manufacturer. Please refer to the 3SB3 / SIRIUS ACT cross-reference guide located in the technical reference section.