Brush Soft Utility Scrub Green - Short Soft Utility Scrub Brush Green - Short. Bristles are staple-set into a sturdy block. Flagged-tip bristles are resistant to acids and detergents. Polystyrene Bristles designed to hold water and cleaning solution while safely washing away dirt and grime from any surface on your car. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.