The plug of the lower round bar is 12mm, transparent

The plug of a lower round plane of 12mm is transparent for color systems (except white). The plug hides an open weighting pipe and allows you to install a set of fixation of the string. Thanks to the special holes on the plug, ears are installed in it for fixing the string, this design fixes the lower bar in the window plane and does not allow the curtain to deviate when installing the sash for ventilation.