Front element for selector switch Harmony ZB4F. Front black. Up to IP69K. Mounting diameter 30.5 mm. With high vibration resistance and chemical resistance, ambient temperature -40 to +70 degrees C. Chrome-plated metal, 3 positions +/- 45°. Certifications RINA, CSA, LROS (Lloyds register of shipping), DNV, UL listed, GL, BV. Standards UL 508, JIS C 4520, EN/IEC 60947-1, EN/IEC 60947-5-4, CSA C22.2 No 14, EN/IEC 60947-5-1, EN/IEC 60947-5-5.