Features: Oil-proof and dust-proof cover: air filter protective cover, oilproof and dustproof. The main function is to prevent inhalation of dust and prevent more than 90% of the dust from being inhaled. High quality material: this dustproof air intake filters cap is made of high quality dust cloth, good dustproof performance and high durability, and can be used for long-term stable use. Opening mould in original car data, ensures perfect match, high accuracy. Easy to use: this car air filter dust cover is practical , no complicated tools and operations required, convenient to use. Easy to use, direct put on your air intake filters. Application: this air filter protective cover is suitable for most cylindrical high-flow air filters. Specifications: Material:Rubber Diameter :Approx.23cm/9.05inch Package Includes: 1x Air Filter Dust Cover note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.