The Duralast Negative & Positive Battery Terminal Protectors are designed for use on cars, trucks, boats, vans, and more. Made from durable magnesium-aluminum alloy, these terminal protectors are adjustable and can accommodate cables ranging from 6 to 1 gauge. They provide universal fitment and are suitable for various vehicles, including RVs and campers. These terminal protectors offer a secure connection and are a reliable choice for safeguarding your vehicle's battery terminals.