... diameter is 1.2mm; for copper and steel wire the maximum diameter is 0.5mm; and for vegetable wool and ... , wood and so on.Brush hair materials: Copper wire, steel wire, nylon wire, silicon carbide abrasive wire, pig bristles, horsehair, wool, sisal, arenga engleri ... : U shape and h shape. The length and thickness of brush hair are optional.Note: We can provide products of different specifications based ...