uxcell 3mm Mandrel Gray Wire Pen Polishing Brush 22pcs for Rotary Tool Product Name : Pen Polishing Brush;Mandrel Diameter : 3mm/ 1/8"(0.12") Overall Size : 5 x 50mm / 0.2" x 2"(Max D*L);Material : Wire, Metal Color : Gray, Silver Tone Net Weight : 67g Package Content : 22 xPen Polishing Brush