Features: This protective cover provides a perfect protection for air filter, prolong the service life of your air filter. Prevent some water droplets and oil stains from entering, the main function is to prevent inhalation of dust, prevent more than 90% of the dust from being inhaled. Elastic band design, universal fits for most air filter. Made of premium quality material, high performance, reliable and durable. Easy to install, direct put on your air filter, simple and convenient. Specification: Material: Polyester Fibre Color: Black Size: Big, Small (optional) Package Size: 10 * 10 * 5cm / 3.94 * 3.94 * 1.97in Package Weight: 10g / 0.35oz Package List: 1 * Air Filter Cover