The profile is made of PVC. It is the main connecting device for covers: square art. 001 and round art. 002, as well as a landing platform for mechanisms (mechanism 17 mm art. 018, mechanism 17 mm plain matt art. 023 and mechanism 25 mm plane matt art. 028). Roller blinds assembled on such a profile are installed on the opening sash in less than 1 minute using hooksart. 031. Installation on a blind sash and opening is carried out using a steel bracket, which is installed on only 1 self-tapping screw, then the profile with the curtain is simply snapped into it. This profile is also used for Day-and-Night roller blinds.