... 1.Material:PP ,horsehair, steel,cooper wire 2.Style:Hand brush 3.OEM stainless steel tube Brush with long handle ... silk material with a gold, fiber hair, bristles, steel, copper wire, abrasive silk etc, are a different ... trough, can choose steel wirebrush or copper tube tube brush. 2, when using pressure don't too big ... , too much pressure on both sides to fine ...