This Harmony XB5 blue head for indicator light comes with BA9s base. It has a round shape and a protective collar. This head with BA9s base indicator light is designed to be maintenance-free and serves as a luminous indicator for process and machine operations. It is visually easy to distinguish thanks to a clear Len color and allows complex machine statuses to be read at a glance. Thanks to its IP66 protection rating, it is shockproof, dustproof, waterproof and vibration-resistant, making it ideal for use in harsh environments.