Looking for a reliable fuel tank cap that fits all petrol/diesel cars? Look no further than this AA Universal Emergency Fuel Cap. Made from flexible plastic, this reusable cap is easy to fit and requires no cutting. With an exterior diameter of 18.8mm and an interior diameter of 9.9mm, it is compatible with a wide range of vehicles. The black fuel tank cap is lightweight, weighing just 30 grams, and has a height of 4.3mm. Its features include a secure seal to prevent leaks and ensure optimal fuel efficiency. Whether you need to replace a lost or damaged fuel cap or just want a spare for emergencies, this AA Universal Emergency Fuel Cap is a reliable and convenient choice.