Muc-Off's Bio Drive Train Cleaner is the solution for all dirty, sticky, and greasy drivetrain components. It is simply sprayed onto the chain, derailleur, sprockets, and shifters. After that, let the cleaner sit for 3-5 minutes. For stubborn dirt, it is best to use the Detailing and Claw Brush, and then simply rinse it off. It is biodegradable and therefore safe for the environment. It can be used in combination with the X3 Chain Cleaning Device by filling the designated reservoir with the cleaner. Important: A spray nozzle is not included. Quick and effective grease-cutting formula. Removes all chain oil, grease, and wax residues. Safely eliminates contaminants from the drivetrain and chain. Biodegradable. Ideal for use with the X3 Chain Cleaning Device. Cleans all areas of the drivetrain and chain in seconds.