Picote Coating Brushes are used for Brush Coating Pipes by applying Picote Coating Resin using Picote Millers, and Picote Pumps. They can also be used for gentle Cleaning/Sweeping out Debris/Water as needed in certain applications. ***NOTE: BRUSHES ARE LISTED BY ACTUAL SIZE. It is recommended to oversize your Brushes to the diameter of the Pipe you intend to Coat. For example, Coating a 4" Pipe with the Maxi Miller would involve x2 5" or even x2 6" Brushes. If you were Coating a 4" Pipe with the Mini Miller however, you would require a slightly different setup. We would recommend using 4" Brush and a 5" Brush for this application. Please feel free to reach out to us directly if you have any questions or would like more clarification before placing your order.