22MM PLASTIC ROUND COMPLETE UNIT COMBINATION: TWIN PUSHBUTTON+INDICATOR LIGHT MOMENTARY CONTACT TYPE WITH FLAT BUTTONS ILLUMINATED WITH LAMP HOLDER BA 9S WITH LAMP 2W, 24V AC/DC SPRING-LOADED TERMINAL,1NO,1NC INCL. HOLDER FOR 3 ELEMENTS WITH HOLDER GREEN-RED INSCRIPTION GREEN: I; RED: O