A cup brush is a channel brush that is formed into a concentric circle. Cup brushes have very specific applications. Do you need a custom cup brush? The custom cup brush design form allows you to easily input your required specifications. Simply fill in the information found in the "Brush Information" section and submit your request. Use the engineering schematic diagram as a guide to help you fill in your specs. Once submitted, our design engineers will review your submission and provide you with your custom cup brush quote within 7-10 working days. If they have any questions, they will contact you directly.