Is Real Horse Hair Used to Make Cleaning Brushes?

Yes. Horse hair is usually from Argentina.  Price increases with length and stiffness of the hairs.  Usually soft, but may be blended with other fibers to a moderate stiffness.  Usually white, black or grey.  Used as counter brushes, window and radiator brushes as well as brooms. It works well for sweeping polished surfaces, dusting, flux removal and general cleanup and is non-conductive.