70MM STEEL ROTO BRUSHRoto Steel Brush to deep clean the base of cross country skis before wax application. Racing Roto Steel cross country 70 mm brush. New series of XC brushes in 70 mm to combine brushes that best suit your purpose. Attach two pieces of the 70mm brushes on the 140mm handle, Swix T0015HPS 3. The steel brush is used as the first brush after hot waxing and scraping before the horsehair brush. It is also used to deep clean the base after cleaning the glide