Universal: The inner diameter of the wheel nut cap is 17mm, which is suitable for most car hex nuts. And the bolt covers are good for dust, also can decorate car tires. .Long term use: These wheel nut caps are made of premium plastic material, sturdy and durable, they can serve for a long time, protect the wheel bolts. .Easy to use: simply press the nut cap directly onto the bolt. And the package includes 20 pieces of tire screw covers. Also include a black plastic clip to remove the nut cap. .The black color is a perfect match. The adjustments are very tight and won't come loose easily while riding. They can be removed and replaced with care. .The nut cap has anti-rust function to prevent the screw from rusting. Makes a difference in the look of the wheels. Start with a screw to take care of your car. .