Castle® Dragon Fire™ features a unique formulation of solvents and lubricants to remove carburetor gums and varnishes while lubricating parts. It contains “Resi-Lube,” a chemical that lubricates all moving parts and helps to eliminate moisture between applications. It is completely harmless to all oxygen sensor devices. Extension tube included. Dragon Fire™ is excellent for removing varnish from transmissions. Uses: • Carburetor • Linkage • Free up heat riser • Choke • PCV System • Small parts cleaner