Coats Products' Crimped, Stiff Blue brush with Polypropylene bristles is a robust cleaning tool designed for heavy-duty scrubbing tasks. Its Polypropylene bristles deliver exceptional scrubbing action, making it ideal for tackling tough grime and dirt on surfaces like wheel wells and tires. These bristles are highly resistant to acids, heat, chemicals, and solvents. Whether in automotive detailing or industrial applications, this brush stands out as a reliable and effective choice for those seeking superior cleaning performance in challenging environments.