Series A The modern series A offers an exciting selection of shapes, colours and materials. Coloured frames made of plastic or glass bring fresh accents into the room. This range will win you over with its minimalist and striking design. Manufactured from shatterproof thermoplastic with a wide range of functions for all areas of application in private, residential and contract construction. The functional colour palette in white, grey and black tones accentuates the striking design of A 550.