... BrushesBrush silk material with a gold, pp,, bristles, steel, copper wire, abrasive silk etc, are a different range of use.]To ... slag removal.Also called flue brushes, bottle brushes, and twisted wire tube brushes, these tools are designed for long, strong service ... , such as cast metal trough, can choose steel wirebrush or copper tube tube brush. 2, when using pressure don't too ...