PUSH BUTTON. range of product: Harmony XB4 - device short name: ZB4 - mounting diameter: 22 mm. Benefits: Progress with confidence. Designed for industry, this range combines simplicity of setup, flexibility and a robust construction. An ingenious locking system consisting of a snap-fit head and body, tightened with a single screw, ensures easy yet secure mounting. Applications: - Industry: machine manufacturers (automotive, textiles, timber), control system panel builders, Service sector and infrastructure: energy distribution panel builders, public works, building, airports.