ZB4BW33
Square D (Schneider Electric) ZB4BW33 Harmony Illuminated Pushbutton Head Operator. Schneider Electric Harmony™ Pushbutton Head Operator, Illuminated, Series: ZB4, 22 mm Dia, Round, Metal, Green. Additional Description: SQD -ZB4BW33 PUSH BUTTON. Catalog Description: Harmony, 22mm Push Button, illuminated pushbutton head, flush, spring return, green, for BA9s bulb.