XB4/ZB4 22mm push buttons are for industrial applications. XB4/ZB4 operators have chromium plated metal bezels that connect to a fully metal mounting collar. Operator is a turn to release push button with a 40mm red mushroom button. The operator has one normally closed contact. Contact has UL A600, UL Q600, IEC AC15 and IEC DC13 contact ratings. The mushroom button is NEMA 4, 4X and 13 rated. Turn to release mushroom button is 1.85 inches tall, 1.57 inches wide and 3.23 inches deep. The push button assembly weighs 0.26 lbs. This point of purchase product is packaged in a blister pack. Push button is UL Listed and CSA certified "It is ideal for machine builder industry applications such as automotive, textile and wood. It is also suitable for use in public works, building and airport." "This product meets EN/IEC 60947-5-4, EN/IEC 60947-1, IEC 60364-5-53, EN/IEC 60947-5-1, EN/IEC 60947-5-5, JIS C8201-5-1, UL 508 and JIS C8201-1 standards." "It is installed into a 22mm panel cutout." "Harmony delivers an innovative and ergonomic design that improves the reliability of panels, machines and processes." "The modular range of 22mm metal control and signaling units combine simplicity of installation, modern standard and flush mounted design."