ø22.3mm mounting hole compliant with IEC 60947-5-1, 3.5-mm operator travel for pushbuttons ensures comfortable and reliable operation, Black and metallic bezels available, Illuminated pushbuttons, pushbuttons, pilot lights, selector switches and key selector switches are available, Direct opening NC contact, 10A contact rating; up to three contact blocks for non-illuminated and two contact blocks for illuminated models can be connected, Up to 6 contacts per switch, UL Type 4X rating