Front element for illuminated pushbutton Harmony ZB4F. Lens blue, text - unlabeled. Design - protruding, with detent, LED. Mounting diameter 30.5 mm. With high vibration resistance and chemical resistance, ambient temperature -40 to +70 degrees C. Chrome-plated metal, 500,000 cycles. Certifications - UL listed, CSA. Product standards - EN/IEC 60947-1, UL 508, JIS C 4520, EN/IEC 60947-5-4, EN/IEC 60947-5-1, CSA C22.2 No 14. Protection class up to IP69K.