Central piece with rotary knob for 3-stage switch S.1/B.3/B.7 in polar white, matte. The switch program is available in glossy polar white (similar to RAL 9010), glossy white (similar to RAL 1013), and glossy red (similar to RAL 3003). It is made of duroplastic, is scratch-resistant, and comes in matte polar white (similar to RAL 9010) and matte anthracite (similar to RAL 7021) made from thermoplastic, which is shatterproof and impact-resistant. The frame is available in 1-gang to 5-gang and can be installed both vertically and horizontally. The square base shape has sharp corners with a radius of 0.4 mm and a curved geometry with a glossy or matte surface. The rockers/covers have a curved geometry with edge dimensions of 55 mm x 55 mm and corners with a radius of 0.4 mm. The installation devices are suitable for IP 20 / 21. There is partial labeling capability through writable rockers/covers as well as writable frames in 1-gang to 5-gang. The products are abrasion-resistant, marked by printing, and can be illuminated according to workplace regulations. The material used is halogen-free and UV-stable, and the surfaces are easy to clean and resistant to disinfectants. Over 200 applications.