Lessmann LES43012607 DIY Cup Brush with Shank 50mm 0.25 Brass Wire The Lessmann DIY Cup Brush is fitted with 6mm shank. It has been designed for working on large surfaces generally for the removal of rust paint dirt or scale and for polishing. 430.123.07: Wire: 0.35 Steel Diameter: 50mm. 430.133.07: Wire: 0.35 Steel Diameter: 75mm. 430.126.07: Wire: 0.25 Brass Diameter: 50mm. The Lessmann DIY Cup Brush has the following specification: Wire: 0.25 Brass. Diameter: 50mm. Max/Min: 4.500.