The A/C Line O-Ring Kit by Motorcraft, part number YF-37200, includes a single o-ring designed to fit air conditioning lines in vehicles. It comes with a 1-year manufacturer warranty, ensuring quality and reliability. This kit is a genuine part from the manufacturer, making it a trusted choice for maintaining your car's air conditioning system. With the Motorcraft brand reputation and specific part number, you can be confident in the fit and performance of this o-ring kit for your vehicle.