... Materials for brushes: PA, PBT, PE, PP, PVC, steel wire, copper wire, arenga engleri, horsehair and various animal hair and vegetable ... the maximum diameter is 1.2mm; for copper and steel wire the maximum diameter is 0.5mm; and for vegetable ... , wood and so on.Brush hair materials: Copper wire, steel wire, nylon wire, silicon carbide abrasive wire, pig bristles, horsehair, wool, sisal, arenga engleri ...