... Manual Operation Tube Brushes Tube Brushes and Twisted Wire Tube BrushesBrush silk material with a gold, pp ... ,, bristles, steel, copper wire, abrasive silk etc, are a different range of ... called flue brushes, bottle brushes, and twisted wire tube brushes, these tools are designed for long ... material selection of tube brush, such as cast metal trough, can choose steel wirebrush or copper ...