The Libman Bottle Brush uses zinc-coated rust resistant wire that is twisted to hold the 1.875 fibers. Bottle brush makes cleaning inside any bottle faster and easier with strong scrubbing fibers. Hanger hole molded into handle for easily storage when not in use. Handle is made with Libman patented grip design that will not slip when wet. Scrubbing fibers are 1.875 long to reach in bottle corners.