Aluminium profile windows cold starts to be produced in Bulgaria in 80 years of last century. In the past, main frames, with increased energy efficiency requirements for external doors and windows from cold profile hardly produced. Cool clicker systems already use a couple mainly terraces, internal partitions and doors. Cech-plast  selected to produce frames of the following companies: Schuco - Germany and Alumil, Etem, Exalco - Greece.