This Harmony XB4, black selector switch head with knurled knob has 2 positions, operates with stay-put mechanism.This switch head with knurled knob provides an ergonomic interface for controlling your machines.It can easily be installed on compatible selector switch units and provide an effective manner to set your machine in various operating modes.It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP69K.It has a metal bezel, this makes it Ideal for applications requiring high impact and vibration resistance.It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery.Its wide range of operating temperatures from -40°C to 70°C allows versatility in usage of product.