The Gordon Brush 710212 is a polypropylene metal-fre tube brush. These metal-free tube brushes with flexible stems and is FDA compliant. They are used to clean the inside of straight and especially curved pipes and tubes. They also clean valves and fittings, or anywhere aggressive scrubbing is needed. Metal Free tube brushes will not scratch almost any surface. Made with 100% food-grade polypropylene. Polypropylene is resistant to acids, alkalis, alcohols, and many petroleum distillates. These brushes can be used to clean the inside of straight or curved tubes, pipes, valves, and fittings. They are great when moderate to aggressive scrubbing is needed. These brushes will not scratch most surfaces. Fused bristles help minimize the growth of bacteria. Available in white only.