70MM BLUE NYLON ROTO BRUSH"Roto nylon brush for final polishing of all cross country glide and liquid waxes. Racing Roto Nylon cross country 70mm brush is part our series of XC brushes in 70mm for combining the brushes that best suit your purpose. Attach two pieces of the 70mm brushes on the 140mm handle, eg T15 140. Then attach the Roto Cover with the brushes on to your drill. Since you're attaching a 70mm brush on a 140mm roto cover handle you can easily combine brushes on