STA - Sociedade Transformadora de Alumínios, SA was established in 1989 in straight cooperation with the Belgian group Sobinco, and is a company specialized in the development and production of systems for doors and windows, in particular for aluminium profiles. In 2006 STA achieved the Quality Certification according to ISO Standard 9001 (Tüv Certificate). Representing Sofi trademark, implemented in the market for over 40 years, STA is a reference regarding Technology, Innovation, Design, Quality and Durability; STA counts today with a team of 160 top qualified professionals. Representing the brand Sofi, in the market for more than 40 years, we are a reference in Technology, Innovation, Design, Quality and Durability.