This Harmony XB4 modular black push button operates with a spring return / impulse mechanism.It has a metal bezel.This push button provides an ergonomic interface for controlling your machines.It is easily installed into standard 22mm diameter panel cut-outs and connected to control circuits with classic screw-clamp connections.Its schematic is clearly distinguishable thanks to clear colors and markings, minimizing errors during initial wiring and later maintenance operations.It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66 / IP67 / IP69 / IP69K, making it ideal for operation in harsh environments.