Green pushbutton Ø 22, spring return, for insertion of legend, 1 NO, ATEX. range of product: Harmony XB4 – product or component type: complete push-button – device short name: XB4 – fixing collar material: zamak – head type: standard – mounting diameter: 22 mm – dust zone: zone 21 – 22 – operator additional information: booted (clear silicon) for insertion of legend.