Plastic push button, Harmony XB5 series, as front element and 22 mm installation dimension. The color of the push button is green and labeled with START. The actuation function is without detent. The color of the outer ring is gray. The modular Harmony series with 22 mm installation dimension combine easy installation, efficiency, modern design, flexibility with maximum robustness. IP protection classes up to IP69K and ambient temperatures from -40°C to +70°C. Product standards in accordance with EN/IEC 60947-5-1, EN/IEC 60947-5-4, CSA C22.2 No 14, UL 508, EN/IEC 60947-1, JIS C 4520. Certifications according to DNV, GL, UL listed, RINA, BV, CSA, LROS (Lloyds register of shipping). Product standards according to EN/IEC 60947-5-1, EN/IEC 60947-5-4, CSA C22.2 No 14, UL 508, EN/IEC 60947-1, JIS C 4520.