Central piece with adjustment knob for rotary dimmer B.7 alu, matte. Switch program available in polar white glossy (similar to RAL 9010), white glossy (similar to RAL 1013), red glossy (similar to RAL 3003), made of duroplastic, scratch-resistant, and in polar white matte (similar to RAL 9010), anthracite matte (similar to RAL 7021), made of thermoplastic, shatterproof and impact-resistant. Frame available in 1 to 5 gang, usable both vertically and horizontally. Square base shape with sharp corners featuring a 0.4 mm rounding radius, with a curved geometry and glossy or matte surface. Rockers/covers with a curved geometry with edge length of 55 mm x 55 mm and corners with a 0.4 mm rounding radius. Installation devices are suitable for IP 20 / 21. Possibility for labeling partially through writable rockers/covers as well as with writable frames from 1 to 5 gang. Abrasion-resistant product labeling through printing. Illuminable according to workplace regulations. The materials used are halogen-free and UV-stable, the surfaces are easy to clean and resistant to disinfectants. Over 200 applications.