SCHNEIDER ELECTRIC ZB4BC2 Non-Illum Push Button Operator, Black. More details: Push Button Operator, 22mm, Momentary, Type of Operator 40mm Dia. Mushroom, Head Material Aluminum-Zinc Alloy, Bezel Chrome Die Cast Aluminum, Color Black, Number of Operators 1, NEMA Rating 1, 2, 3, 4, 4X, 13, IP Rating 66, Standards UL, CSA, CE, RoHS