This 2Pcs waterproof cap set effectively protects your car's cigarette lighter socket. Designed to fit most standard 12V car cigarette lighter adapters (21mm inner diameter), these durable black caps prevent dust, moisture, and debris from entering the socket. Easy to install and made from high-quality materials, they ensure lasting protection for your vehicle's electrical components. Ideal for keeping your car interior clean, your cigarette lighter socket tidy, and fully functional