Muc-Off's Bio Drive Train Cleaner is the solution for all dirty, sticky, and greasy drivetrains. It is simply sprayed onto the chain, derailleur, sprockets, and shifters. After that, let the drivetrain cleaner sit for 3-5 minutes. For stubborn dirt, it's best to use the Detailing and Claw Brush, and then just rinse it off. It is biodegradable and therefore harmless to the environment. It can be used in combination with the X3 Chain Cleaning Device by filling the designated reservoir with the drivetrain cleaner. Important: No spray nozzle is included. Quick and effective grease-dissolving 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.