... of brush can be used for rust removing and welding surface finishing1- diameter sizes in mm: 8mm, 10mm, 15mm, ... 20mm,25mm,30mm2- length of wire outside:12mm,13mm,15mm,20mm,25mm,30mm3- shaft diameter: 6mm4 ... 5mm,10mm,15mm,18mm,25mm,30mm,50mm5- wire type: S- gray carbon steel wire crimped: Dia 0.20,0.30, ... 0.35mm BS- brass coated stell wire crimped Dia 0.20,0.30mm SS- stainless steel ...