The Lessmann Cup Brushes are filled with crimped wire are ideal for working on large surfaces. They can also be used for the removal of rust, paint, dirt or scale and for polishing. A range of sizes and wire styles are available.Diameter. 60mm.Wire Height. 20mm.Bore. M10 x 1.25.Wire Gauge. 0.35.Wire Type. Steel.Max. R.P.M. 12,000. Age Group: Adult. Material: Other Material.