Formula 100 Speed Clean Chain Drivetrain Brush. Features: Engineered for deep cleaning performance and simple convenience and works great with the Speed Clean Chain Drivetrain Degreaser Innovative 360 channel brush utilizes a dual density bristle layout to get a deep clean of your chain both inside and out, while the long bristles let you clean all the hard-to-reach spots on your derailleur Specs: Model:Speed Clean Chain Drivetrain Brush Description:Drivetrain Brush