The series 521 is characterized by a simple and essential line. Its versatility makes it suitable for use in a variety of contexts. Aluminum primary alloy structure, alloy 6060 profiles, aluminum die cast components and shaped sheet. Anti-corrosion treatment and powder coatings. All hardware is stainless steel AISI 304. Fittings with an E27 ceramic lamp-holder with protection silicone gasket. In the series 521 the concave surface of reflector is painted Signal White RAL 9003. Lamp-holder is protected by cup aluminium shaped sheet painted RAL 9003. In the series 5.521, 6.521 and 7.521 the convex surface of reflector is aluminium shaped sheet painted RAL 9003. Wall mounted fitting are accompanied by counterbase and on request by corner cupboard. The diffuser series 6.521 and 7.521 is made of opal UV stabilized polycarbonate.