Finish Line's Gear Floss is the ultimate detailing tool, perfect for cleaning your cassette, chainrings, derailleur pulleys, hubs and all those hard-to-reach nooks and crannies. Made with microfiber, it works by attracting and capturing dirt, grease and particles inside its star-shaped grooves. Each package has 20, 20-inch-long ropes that are washable and reusable.