The Muc-Off Bio Drivetrain Cleaner is a complete drivetrain cleaning solution that can either be poured into a chain cleaning device or sprayed directly to your chain rings, rear cassettes and derailleurs to clean your entire drivetrain within seconds. It's also fully biodegradable and safe for metal, plastic, rubber and seals. Fast and effective grease cutting formula Removes all chain oil and wax residue Safely Eliminates drive chain contaminants Biodegradable Ideal for use with chain cleaning devices Trigger spray included for easy application