YW1B-M4E11B
Pushbutton - IDEC (YW Series Pushbuttons) - Blue (B) - Momentary operation - Diameter (Mounting hole) 22mm - 1NO+1NC contact(s) - Removable contact blocks - (Head) Round shape - Screw (M3.5) connection - Material (Contact) Silver - Material (Bezel) Plastic - IP65