This kit contains both replacement distributor O-rings (the smaller one for the distributor shaft, the larger for the housing). The O-ring kit will correct oil leaks from the distributor housing, which is often misdiagnosed as a leaking main seal! Replacing the distributor O-rings can be done quickly and easily! The rings are made from high quality, heat and oil resistant Viton 75 rubber. This kit works with all 8 and 16-valve engines used Suzuki and Geo vehicles such as the Metro, Swift, Sidekick, Vitara, Samurai, Jimny and Tracker.