Looped Spoke Brush a 10 inch rim brush great for getting to tough or stuck dirt out of places. The looped Brush if made with stiff black polypropylene bristles. These bristle are actually twisted into the wire designed to help you push it into any tight area and clean it out fast and easy. Poly-coated bristles make it chemical resistant to any hard hazardous chemicals used in today's market. With .375" bristles and a 10" brush easy for handling.