Push Button Operator, 22 mm, Momentary Push, Type of Operator Flush Button, Basic Material Metal, Head Material Aluminum-Zinc Alloy, Bezel Material Chrome Die Cast Aluminum, Color Green, NEMA Rating 1, 13, 2, 3, 4, 4X, IP Rating 66, Legend UP , Legend/Background Color Black/White, Standards CE, CSA, EN/IEC 60947-5-4, EN/IEC 60947-5-5, RoHS, UL