Designed for surface finishing and cross hole deburring in brake cylinders, wheel cylinders, hydraulics anpneumatics and so on. Flexibiablehone brush, 2 or 4 wires, material: AL2O3,SiC;Dia:8, 10,12,14,16,18,20,22,25,32,38,50,63,76,89,102,115,127mm;Grits:36,80,120,180,240,320,380,520#;Aol: 200mm,Brush length:60mm-100mm;