Central piece with lock for roller shutter key switch Q.1/Q.3 polar white, velvet. Q.1 program description (long text) Switch program made of duroplastic, scratch-resistant, in polar white color (similar to RAL 9010). Frame available in 1-gang to 5-gang, usable both vertically and horizontally. Square basic shape with rounded corners featuring a 4 mm radius, with flat geometry and a velvet-like surface. Rockers/covers with edge dimensions of 58 mm x 58 mm and rounded corners with a 2 mm radius. The socket central pieces and many other central pieces create a flush surface with the frame. Installation devices can be partially used with a separate sealing set for water protection UP IP 44. Possibility of labeling through labelable frames, both vertically and horizontally, from 1-gang to 5-gang. Abrasion-resistant product labeling using laser technology. Illuminable according to workplace regulations. The material used is halogen-free and UV-stable, surfaces are easy to clean and resistant to disinfectants. Over 270 applications.