Front element for double pushbutton Harmony ZB5. Front white/black, cover plastic, I/O. 2 flat pushbuttons, white I, black O. Dimensions (WxHxD) 30x50x30 mm, mounting diameter 22 mm, weight 0.023 kg. It is easy to install and can be exchanged on compatible complete pushbutton units and switching elements using a snap-on assembly. Mechanical life 1,000,000 cycles. Head shape rectangular, standard. With high vibration resistance and chemical resistance, ambient temperature -40 to +70 degrees C. The modular plastic range with 22 mm installation dimension combines easy installation, efficiency, modern design, flexibility with maximum robustness. Certifications according to DNV, LROS (Lloyds register of shipping), GL, RINA, CSA, BV, UL listed. Product standards according to JIS C 4520, CSA C22.2 No 14, EN/IEC 60947-5-4, EN/IEC 60947-5-1, EN/IEC 60947-1, UL 508.