Weatherproof dust covers are made to protect 4 flat connectors from harsh conditions. Keeping a dust cover on your connector will help prevent corrosion leading to a good quality connection when you are ready to tow. Product Features:Vehicle And Trailer Side Dust CoverRidges On Body Give An Extra GripTerminal Grease Provided To Prevent CorrosionAttaches Around Body Of 4 FlatIncludes Step-By-Step Procedures And Diagrams