The triangle is perfect indeed. Euclid and Pythagoras spent years of their lives on studying that ideal in any aspect geometric figure not in vain. These cassettes demonstrate their efforts – the triangles bear against each other and form together trapezoids and rhombuses. The arrangement of these shapes has become the highlight and differential peculiarity of modern architecture that brings harmony into any modern style, staring from avant-garde to chaotic eclecticism. Neutral colors easily compensate the complex visual perception of lines and squares. These colors help to achieve a perfect balance in the design of facades. Installation method – to a system with steel or aluminum rails with a flat surface for fixation carried out by rivets.