Ceiling lamp provide direct or indirect light. Body, head and cap are extruded anti corodal 6010 aluminum alloy with phosphochromed non-corrosive protection. Reflector is gloss white injection-molded polycarbonate. The diffusers are available in opal white, or in transparent finish whenever high efficiency is required; the engineering plastics used are injection-molded, UV-stabilized. The mechanical joint has two die-cast 46100 aluminum alloy flanges with "yellow alodine" non-corrosive protection, two friction elements made respectively of injection-molded acetal resin (POM) and nylon 30% glassfiber. Silicone elastomer fittings. The screws, which are exposed to weather conditions, are in stainless steel (AISI 316). Accessories include louver screens in diecast Zamak 12 with non-corrosive "yellow alodine" protection and matte black epoxy powdercoat finish, they modify the angle at which the beam of light leaves the luminaire for enhanced visual comfort.