This is a genuine manufacturer-approved part that is specially made for use with Southland and Airstream handheld lawn and garden equipment. It is designed to keep the fuel in the tank, unfortunately, over time it may wear out and begin to fail eventually requiring a replacement. It includes a retainer that remains in the tank to keep the...Read more fuel cap from being lost or falling on the ground. Keep in mind it is made of high-quality plastic and is sold individually. Please make sure to check the appropriate diagrams of your model for the correct location and application of this part.