Technical Specification Item Push Button Operator Size 22mm Action Maintained Push / Key Release Type of Operator 40mm Mushroom Head Basic Material Metal Head Material Aluminum-Zinc Alloy Bezel Material Chrome Die Cast Aluminum Color Black NEMA Rating 1, 2, 3, 4, 4X, 13 IP Rating 66 Legend No Legend Standards EN/IEC 60947-1, EN/IEC 60947-5-1, UL, CSA, CE, RoHS Includes Ronis 458A Key This listing is for each.